Home / 38,143.19-52,643.05-21,151.21

Finding the Fourth Proportional to 38,143.19, 52,643.05 and 21,151.21

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Solution

The fourth proportional to 38,143.19, 52,643.05 and 21,151.21 is: 29,191.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,143.19 : 52,643.05 = 21,151.21 : x
  2. Step 2: Convert to fraction form
    38,143.19/52,643.05 = 21,151.21/x
  3. Step 3: Cross multiply
    38,143.19x = 52,643.05 × 21,151.21
  4. Step 4: Simplify right side
    38,143.19x = 1,113,464,205.59
  5. Step 5: Solve for x
    x = 1,113,464,205.59/38,143.19
  6. Step 6: Final answer
    x = 29,191.69

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Half scale
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Double scale
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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.