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Finding the Fourth Proportional to 8,931.15, 13,405.47 and 7,459.80

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Solution

The fourth proportional to 8,931.15, 13,405.47 and 7,459.80 is: 11,197.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.15 : 13,405.47 = 7,459.80 : x
  2. Step 2: Convert to fraction form
    8,931.15/13,405.47 = 7,459.80/x
  3. Step 3: Cross multiply
    8,931.15x = 13,405.47 × 7,459.80
  4. Step 4: Simplify right side
    8,931.15x = 100,002,125.11
  5. Step 5: Solve for x
    x = 100,002,125.11/8,931.15
  6. Step 6: Final answer
    x = 11,197.00

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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.