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Finding the Fourth Proportional to 11,440.68, 15,808.68 and 8,929.20

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Solution

The fourth proportional to 11,440.68, 15,808.68 and 8,929.20 is: 12,338.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,440.68 : 15,808.68 = 8,929.20 : x
  2. Step 2: Convert to fraction form
    11,440.68/15,808.68 = 8,929.20/x
  3. Step 3: Cross multiply
    11,440.68x = 15,808.68 × 8,929.20
  4. Step 4: Simplify right side
    11,440.68x = 141,158,865.46
  5. Step 5: Solve for x
    x = 141,158,865.46/11,440.68
  6. Step 6: Final answer
    x = 12,338.33

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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.