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Finding the Fourth Proportional to 12,656.90, 18,980.67 and 7,393.70

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Solution

The fourth proportional to 12,656.90, 18,980.67 and 7,393.70 is: 11,087.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.90 : 18,980.67 = 7,393.70 : x
  2. Step 2: Convert to fraction form
    12,656.90/18,980.67 = 7,393.70/x
  3. Step 3: Cross multiply
    12,656.90x = 18,980.67 × 7,393.70
  4. Step 4: Simplify right side
    12,656.90x = 140,337,379.78
  5. Step 5: Solve for x
    x = 140,337,379.78/12,656.90
  6. Step 6: Final answer
    x = 11,087.82

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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.