Home / 15,639.13-21,581.20-8,565.40

Finding the Fourth Proportional to 15,639.13, 21,581.20 and 8,565.40

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Solution

The fourth proportional to 15,639.13, 21,581.20 and 8,565.40 is: 11,819.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.13 : 21,581.20 = 8,565.40 : x
  2. Step 2: Convert to fraction form
    15,639.13/21,581.20 = 8,565.40/x
  3. Step 3: Cross multiply
    15,639.13x = 21,581.20 × 8,565.40
  4. Step 4: Simplify right side
    15,639.13x = 184,851,610.48
  5. Step 5: Solve for x
    x = 184,851,610.48/15,639.13
  6. Step 6: Final answer
    x = 11,819.81

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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.