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Finding the Fourth Proportional to 15,815.12, 23,722.68 and 8,903.12

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Solution

The fourth proportional to 15,815.12, 23,722.68 and 8,903.12 is: 13,354.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.12 : 23,722.68 = 8,903.12 : x
  2. Step 2: Convert to fraction form
    15,815.12/23,722.68 = 8,903.12/x
  3. Step 3: Cross multiply
    15,815.12x = 23,722.68 × 8,903.12
  4. Step 4: Simplify right side
    15,815.12x = 211,205,866.76
  5. Step 5: Solve for x
    x = 211,205,866.76/15,815.12
  6. Step 6: Final answer
    x = 13,354.68

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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.