Home / 15,715.32-21,685.80-9,426.48

Finding the Fourth Proportional to 15,715.32, 21,685.80 and 9,426.48

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Solution

The fourth proportional to 15,715.32, 21,685.80 and 9,426.48 is: 13,007.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.32 : 21,685.80 = 9,426.48 : x
  2. Step 2: Convert to fraction form
    15,715.32/21,685.80 = 9,426.48/x
  3. Step 3: Cross multiply
    15,715.32x = 21,685.80 × 9,426.48
  4. Step 4: Simplify right side
    15,715.32x = 204,420,759.98
  5. Step 5: Solve for x
    x = 204,420,759.98/15,715.32
  6. Step 6: Final answer
    x = 13,007.74

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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.