Home / 38,139.28-52,630.80-21,144.24

Finding the Fourth Proportional to 38,139.28, 52,630.80 and 21,144.24

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Solution

The fourth proportional to 38,139.28, 52,630.80 and 21,144.24 is: 29,178.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,139.28 : 52,630.80 = 21,144.24 : x
  2. Step 2: Convert to fraction form
    38,139.28/52,630.80 = 21,144.24/x
  3. Step 3: Cross multiply
    38,139.28x = 52,630.80 × 21,144.24
  4. Step 4: Simplify right side
    38,139.28x = 1,112,838,266.59
  5. Step 5: Solve for x
    x = 1,112,838,266.59/38,139.28
  6. Step 6: Final answer
    x = 29,178.27

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Half scale
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Double scale
Find fourth proportional to 38,140.28, 52,632.18 and 21,145.24
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.