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Finding the Fourth Proportional to 8,998.66, 12,419.76 and 5,815.90

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Solution

The fourth proportional to 8,998.66, 12,419.76 and 5,815.90 is: 8,026.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.66 : 12,419.76 = 5,815.90 : x
  2. Step 2: Convert to fraction form
    8,998.66/12,419.76 = 5,815.90/x
  3. Step 3: Cross multiply
    8,998.66x = 12,419.76 × 5,815.90
  4. Step 4: Simplify right side
    8,998.66x = 72,232,082.18
  5. Step 5: Solve for x
    x = 72,232,082.18/8,998.66
  6. Step 6: Final answer
    x = 8,026.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.