Home / 15,581.26-21,503.76-9,209.92

Finding the Fourth Proportional to 15,581.26, 21,503.76 and 9,209.92

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Solution

The fourth proportional to 15,581.26, 21,503.76 and 9,209.92 is: 12,710.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.26 : 21,503.76 = 9,209.92 : x
  2. Step 2: Convert to fraction form
    15,581.26/21,503.76 = 9,209.92/x
  3. Step 3: Cross multiply
    15,581.26x = 21,503.76 × 9,209.92
  4. Step 4: Simplify right side
    15,581.26x = 198,047,909.30
  5. Step 5: Solve for x
    x = 198,047,909.30/15,581.26
  6. Step 6: Final answer
    x = 12,710.65

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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.