Home / 15,601.20-21,420.80-15,195.12

Finding the Fourth Proportional to 15,601.20, 21,420.80 and 15,195.12

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Solution

The fourth proportional to 15,601.20, 21,420.80 and 15,195.12 is: 20,863.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,601.20 : 21,420.80 = 15,195.12 : x
  2. Step 2: Convert to fraction form
    15,601.20/21,420.80 = 15,195.12/x
  3. Step 3: Cross multiply
    15,601.20x = 21,420.80 × 15,195.12
  4. Step 4: Simplify right side
    15,601.20x = 325,491,550.52
  5. Step 5: Solve for x
    x = 325,491,550.52/15,601.20
  6. Step 6: Final answer
    x = 20,863.24

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Half scale
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Double scale
Find fourth proportional to 15,602.20, 21,422.17 and 15,196.12
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.