Home / 21,451.60-29,617.68-13,397.56

Finding the Fourth Proportional to 21,451.60, 29,617.68 and 13,397.56

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Solution

The fourth proportional to 21,451.60, 29,617.68 and 13,397.56 is: 18,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,451.60 : 29,617.68 = 13,397.56 : x
  2. Step 2: Convert to fraction form
    21,451.60/29,617.68 = 13,397.56/x
  3. Step 3: Cross multiply
    21,451.60x = 29,617.68 × 13,397.56
  4. Step 4: Simplify right side
    21,451.60x = 396,804,644.86
  5. Step 5: Solve for x
    x = 396,804,644.86/21,451.60
  6. Step 6: Final answer
    x = 18,497.67

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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.