Home / 20,922.76-28,875.18-11,493.28

Finding the Fourth Proportional to 20,922.76, 28,875.18 and 11,493.28

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Solution

The fourth proportional to 20,922.76, 28,875.18 and 11,493.28 is: 15,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.76 : 28,875.18 = 11,493.28 : x
  2. Step 2: Convert to fraction form
    20,922.76/28,875.18 = 11,493.28/x
  3. Step 3: Cross multiply
    20,922.76x = 28,875.18 × 11,493.28
  4. Step 4: Simplify right side
    20,922.76x = 331,870,528.79
  5. Step 5: Solve for x
    x = 331,870,528.79/20,922.76
  6. Step 6: Final answer
    x = 15,861.70

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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.