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Finding the Fourth Proportional to 18,721.78, 28,073.28 and 6,237.42

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Solution

The fourth proportional to 18,721.78, 28,073.28 and 6,237.42 is: 9,353.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.78 : 28,073.28 = 6,237.42 : x
  2. Step 2: Convert to fraction form
    18,721.78/28,073.28 = 6,237.42/x
  3. Step 3: Cross multiply
    18,721.78x = 28,073.28 × 6,237.42
  4. Step 4: Simplify right side
    18,721.78x = 175,104,838.14
  5. Step 5: Solve for x
    x = 175,104,838.14/18,721.78
  6. Step 6: Final answer
    x = 9,353.00

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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.