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Finding the Fourth Proportional to 18,010.55, 26,981.40 and 9,687.80

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Solution

The fourth proportional to 18,010.55, 26,981.40 and 9,687.80 is: 14,513.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,010.55 : 26,981.40 = 9,687.80 : x
  2. Step 2: Convert to fraction form
    18,010.55/26,981.40 = 9,687.80/x
  3. Step 3: Cross multiply
    18,010.55x = 26,981.40 × 9,687.80
  4. Step 4: Simplify right side
    18,010.55x = 261,390,406.92
  5. Step 5: Solve for x
    x = 261,390,406.92/18,010.55
  6. Step 6: Final answer
    x = 14,513.18

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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.