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Finding the Fourth Proportional to 16,989.76, 25,490.40 and 8,776

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Solution

The fourth proportional to 16,989.76, 25,490.40 and 8,776 is: 13,166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,989.76 : 25,490.40 = 8,776 : x
  2. Step 2: Convert to fraction form
    16,989.76/25,490.40 = 8,776/x
  3. Step 3: Cross multiply
    16,989.76x = 25,490.40 × 8,776
  4. Step 4: Simplify right side
    16,989.76x = 223,703,750.40
  5. Step 5: Solve for x
    x = 223,703,750.40/16,989.76
  6. Step 6: Final answer
    x = 13,166.98

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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.