Home / 21,117.48-29,154.20-15,769.32

Finding the Fourth Proportional to 21,117.48, 29,154.20 and 15,769.32

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Solution

The fourth proportional to 21,117.48, 29,154.20 and 15,769.32 is: 21,770.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.48 : 29,154.20 = 15,769.32 : x
  2. Step 2: Convert to fraction form
    21,117.48/29,154.20 = 15,769.32/x
  3. Step 3: Cross multiply
    21,117.48x = 29,154.20 × 15,769.32
  4. Step 4: Simplify right side
    21,117.48x = 459,741,909.14
  5. Step 5: Solve for x
    x = 459,741,909.14/21,117.48
  6. Step 6: Final answer
    x = 21,770.68

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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.