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Finding the Fourth Proportional to 12,590.61, 18,877.40 and 7,047.78

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Solution

The fourth proportional to 12,590.61, 18,877.40 and 7,047.78 is: 10,566.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.61 : 18,877.40 = 7,047.78 : x
  2. Step 2: Convert to fraction form
    12,590.61/18,877.40 = 7,047.78/x
  3. Step 3: Cross multiply
    12,590.61x = 18,877.40 × 7,047.78
  4. Step 4: Simplify right side
    12,590.61x = 133,043,726.93
  5. Step 5: Solve for x
    x = 133,043,726.93/12,590.61
  6. Step 6: Final answer
    x = 10,566.90

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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.