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Finding the Fourth Proportional to 15,813.12, 23,719.68 and 8,901.12

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Solution

The fourth proportional to 15,813.12, 23,719.68 and 8,901.12 is: 13,351.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.12 : 23,719.68 = 8,901.12 : x
  2. Step 2: Convert to fraction form
    15,813.12/23,719.68 = 8,901.12/x
  3. Step 3: Cross multiply
    15,813.12x = 23,719.68 × 8,901.12
  4. Step 4: Simplify right side
    15,813.12x = 211,131,718.04
  5. Step 5: Solve for x
    x = 211,131,718.04/15,813.12
  6. Step 6: Final answer
    x = 13,351.68

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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.