Home / 15,715.61-21,688.13-9,426.77

Finding the Fourth Proportional to 15,715.61, 21,688.13 and 9,426.77

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Solution

The fourth proportional to 15,715.61, 21,688.13 and 9,426.77 is: 13,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.61 : 21,688.13 = 9,426.77 : x
  2. Step 2: Convert to fraction form
    15,715.61/21,688.13 = 9,426.77/x
  3. Step 3: Cross multiply
    15,715.61x = 21,688.13 × 9,426.77
  4. Step 4: Simplify right side
    15,715.61x = 204,449,013.24
  5. Step 5: Solve for x
    x = 204,449,013.24/15,715.61
  6. Step 6: Final answer
    x = 13,009.30

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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.