Home / 15,691.34-21,655.20-9,724.17

Finding the Fourth Proportional to 15,691.34, 21,655.20 and 9,724.17

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Solution

The fourth proportional to 15,691.34, 21,655.20 and 9,724.17 is: 13,420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.34 : 21,655.20 = 9,724.17 : x
  2. Step 2: Convert to fraction form
    15,691.34/21,655.20 = 9,724.17/x
  3. Step 3: Cross multiply
    15,691.34x = 21,655.20 × 9,724.17
  4. Step 4: Simplify right side
    15,691.34x = 210,578,846.18
  5. Step 5: Solve for x
    x = 210,578,846.18/15,691.34
  6. Step 6: Final answer
    x = 13,420.07

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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.