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Finding the Fourth Proportional to 9,902.20, 14,831.70 and 8,606.20

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Solution

The fourth proportional to 9,902.20, 14,831.70 and 8,606.20 is: 12,890.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,902.20 : 14,831.70 = 8,606.20 : x
  2. Step 2: Convert to fraction form
    9,902.20/14,831.70 = 8,606.20/x
  3. Step 3: Cross multiply
    9,902.20x = 14,831.70 × 8,606.20
  4. Step 4: Simplify right side
    9,902.20x = 127,644,576.54
  5. Step 5: Solve for x
    x = 127,644,576.54/9,902.20
  6. Step 6: Final answer
    x = 12,890.53

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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.