Home / 21,565.05-29,748.87-12,606.70

Finding the Fourth Proportional to 21,565.05, 29,748.87 and 12,606.70

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Solution

The fourth proportional to 21,565.05, 29,748.87 and 12,606.70 is: 17,390.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,565.05 : 29,748.87 = 12,606.70 : x
  2. Step 2: Convert to fraction form
    21,565.05/29,748.87 = 12,606.70/x
  3. Step 3: Cross multiply
    21,565.05x = 29,748.87 × 12,606.70
  4. Step 4: Simplify right side
    21,565.05x = 375,035,079.43
  5. Step 5: Solve for x
    x = 375,035,079.43/21,565.05
  6. Step 6: Final answer
    x = 17,390.87

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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.