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Finding the Fourth Proportional to 10,905.80, 16,358.70 and 9,480.20

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Solution

The fourth proportional to 10,905.80, 16,358.70 and 9,480.20 is: 14,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.80 : 16,358.70 = 9,480.20 : x
  2. Step 2: Convert to fraction form
    10,905.80/16,358.70 = 9,480.20/x
  3. Step 3: Cross multiply
    10,905.80x = 16,358.70 × 9,480.20
  4. Step 4: Simplify right side
    10,905.80x = 155,083,747.74
  5. Step 5: Solve for x
    x = 155,083,747.74/10,905.80
  6. Step 6: Final answer
    x = 14,220.30

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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.