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Finding the Fourth Proportional to 12,657.38, 18,980.16 and 7,393.91

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Solution

The fourth proportional to 12,657.38, 18,980.16 and 7,393.91 is: 11,087.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.38 : 18,980.16 = 7,393.91 : x
  2. Step 2: Convert to fraction form
    12,657.38/18,980.16 = 7,393.91/x
  3. Step 3: Cross multiply
    12,657.38x = 18,980.16 × 7,393.91
  4. Step 4: Simplify right side
    12,657.38x = 140,337,594.83
  5. Step 5: Solve for x
    x = 140,337,594.83/12,657.38
  6. Step 6: Final answer
    x = 11,087.41

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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.