Home / 16,458.12-22,715.64-15,129.72

Finding the Fourth Proportional to 16,458.12, 22,715.64 and 15,129.72

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Solution

The fourth proportional to 16,458.12, 22,715.64 and 15,129.72 is: 20,882.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,458.12 : 22,715.64 = 15,129.72 : x
  2. Step 2: Convert to fraction form
    16,458.12/22,715.64 = 15,129.72/x
  3. Step 3: Cross multiply
    16,458.12x = 22,715.64 × 15,129.72
  4. Step 4: Simplify right side
    16,458.12x = 343,681,272.82
  5. Step 5: Solve for x
    x = 343,681,272.82/16,458.12
  6. Step 6: Final answer
    x = 20,882.17

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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.