Home / 15,685.42-23,640.86-13,520.28

Finding the Fourth Proportional to 15,685.42, 23,640.86 and 13,520.28

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Solution

The fourth proportional to 15,685.42, 23,640.86 and 13,520.28 is: 20,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.42 : 23,640.86 = 13,520.28 : x
  2. Step 2: Convert to fraction form
    15,685.42/23,640.86 = 13,520.28/x
  3. Step 3: Cross multiply
    15,685.42x = 23,640.86 × 13,520.28
  4. Step 4: Simplify right side
    15,685.42x = 319,631,046.64
  5. Step 5: Solve for x
    x = 319,631,046.64/15,685.42
  6. Step 6: Final answer
    x = 20,377.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.