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Finding the Fourth Proportional to 8,708.96, 12,007.10 and 7,113.90

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Solution

The fourth proportional to 8,708.96, 12,007.10 and 7,113.90 is: 9,807.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.96 : 12,007.10 = 7,113.90 : x
  2. Step 2: Convert to fraction form
    8,708.96/12,007.10 = 7,113.90/x
  3. Step 3: Cross multiply
    8,708.96x = 12,007.10 × 7,113.90
  4. Step 4: Simplify right side
    8,708.96x = 85,417,308.69
  5. Step 5: Solve for x
    x = 85,417,308.69/8,708.96
  6. Step 6: Final answer
    x = 9,807.98

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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.