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Finding the Fourth Proportional to 18,125.80, 27,188.70 and 9,831.40

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Solution

The fourth proportional to 18,125.80, 27,188.70 and 9,831.40 is: 14,747.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,125.80 : 27,188.70 = 9,831.40 : x
  2. Step 2: Convert to fraction form
    18,125.80/27,188.70 = 9,831.40/x
  3. Step 3: Cross multiply
    18,125.80x = 27,188.70 × 9,831.40
  4. Step 4: Simplify right side
    18,125.80x = 267,302,985.18
  5. Step 5: Solve for x
    x = 267,302,985.18/18,125.80
  6. Step 6: Final answer
    x = 14,747.10

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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.