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Finding the Fourth Proportional to 18,283.20, 27,424.80 and 15,211.20

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Solution

The fourth proportional to 18,283.20, 27,424.80 and 15,211.20 is: 22,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,283.20 : 27,424.80 = 15,211.20 : x
  2. Step 2: Convert to fraction form
    18,283.20/27,424.80 = 15,211.20/x
  3. Step 3: Cross multiply
    18,283.20x = 27,424.80 × 15,211.20
  4. Step 4: Simplify right side
    18,283.20x = 417,164,117.76
  5. Step 5: Solve for x
    x = 417,164,117.76/18,283.20
  6. Step 6: Final answer
    x = 22,816.80

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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.