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Finding the Fourth Proportional to 11,005.60, 16,479.60 and 10,487.20

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Solution

The fourth proportional to 11,005.60, 16,479.60 and 10,487.20 is: 15,703.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.60 : 16,479.60 = 10,487.20 : x
  2. Step 2: Convert to fraction form
    11,005.60/16,479.60 = 10,487.20/x
  3. Step 3: Cross multiply
    11,005.60x = 16,479.60 × 10,487.20
  4. Step 4: Simplify right side
    11,005.60x = 172,824,861.12
  5. Step 5: Solve for x
    x = 172,824,861.12/11,005.60
  6. Step 6: Final answer
    x = 15,703.36

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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.