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Finding the Fourth Proportional to 11,445.52, 15,788.28 and 6,728.80

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Solution

The fourth proportional to 11,445.52, 15,788.28 and 6,728.80 is: 9,281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,445.52 : 15,788.28 = 6,728.80 : x
  2. Step 2: Convert to fraction form
    11,445.52/15,788.28 = 6,728.80/x
  3. Step 3: Cross multiply
    11,445.52x = 15,788.28 × 6,728.80
  4. Step 4: Simplify right side
    11,445.52x = 106,236,178.46
  5. Step 5: Solve for x
    x = 106,236,178.46/11,445.52
  6. Step 6: Final answer
    x = 9,281.90

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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.