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Finding the Fourth Proportional to 18,923.52, 28,385.28 and 7,240.32

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Solution

The fourth proportional to 18,923.52, 28,385.28 and 7,240.32 is: 10,860.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.52 : 28,385.28 = 7,240.32 : x
  2. Step 2: Convert to fraction form
    18,923.52/28,385.28 = 7,240.32/x
  3. Step 3: Cross multiply
    18,923.52x = 28,385.28 × 7,240.32
  4. Step 4: Simplify right side
    18,923.52x = 205,518,510.49
  5. Step 5: Solve for x
    x = 205,518,510.49/18,923.52
  6. Step 6: Final answer
    x = 10,860.48

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.