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Finding the Fourth Proportional to 18,617.40, 27,929.70 and 5,470.20

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Solution

The fourth proportional to 18,617.40, 27,929.70 and 5,470.20 is: 8,206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,617.40 : 27,929.70 = 5,470.20 : x
  2. Step 2: Convert to fraction form
    18,617.40/27,929.70 = 5,470.20/x
  3. Step 3: Cross multiply
    18,617.40x = 27,929.70 × 5,470.20
  4. Step 4: Simplify right side
    18,617.40x = 152,781,044.94
  5. Step 5: Solve for x
    x = 152,781,044.94/18,617.40
  6. Step 6: Final answer
    x = 8,206.36

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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.