Home / 20,564.32-28,378.78-11,132.88

Finding the Fourth Proportional to 20,564.32, 28,378.78 and 11,132.88

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Solution

The fourth proportional to 20,564.32, 28,378.78 and 11,132.88 is: 15,363.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.32 : 28,378.78 = 11,132.88 : x
  2. Step 2: Convert to fraction form
    20,564.32/28,378.78 = 11,132.88/x
  3. Step 3: Cross multiply
    20,564.32x = 28,378.78 × 11,132.88
  4. Step 4: Simplify right side
    20,564.32x = 315,937,552.29
  5. Step 5: Solve for x
    x = 315,937,552.29/20,564.32
  6. Step 6: Final answer
    x = 15,363.38

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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.