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Finding the Fourth Proportional to 12,590.94, 18,861.80 and 9,654.90

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Solution

The fourth proportional to 12,590.94, 18,861.80 and 9,654.90 is: 14,463.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.94 : 18,861.80 = 9,654.90 : x
  2. Step 2: Convert to fraction form
    12,590.94/18,861.80 = 9,654.90/x
  3. Step 3: Cross multiply
    12,590.94x = 18,861.80 × 9,654.90
  4. Step 4: Simplify right side
    12,590.94x = 182,108,673.81
  5. Step 5: Solve for x
    x = 182,108,673.81/12,590.94
  6. Step 6: Final answer
    x = 14,463.46

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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.