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Finding the Fourth Proportional to 8,607.75, 12,909.80 and 6,973.58

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Solution

The fourth proportional to 8,607.75, 12,909.80 and 6,973.58 is: 10,458.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.75 : 12,909.80 = 6,973.58 : x
  2. Step 2: Convert to fraction form
    8,607.75/12,909.80 = 6,973.58/x
  3. Step 3: Cross multiply
    8,607.75x = 12,909.80 × 6,973.58
  4. Step 4: Simplify right side
    8,607.75x = 90,027,423.67
  5. Step 5: Solve for x
    x = 90,027,423.67/8,607.75
  6. Step 6: Final answer
    x = 10,458.88

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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.