Home / 28,239.78-42,373.59-19,972.92

Finding the Fourth Proportional to 28,239.78, 42,373.59 and 19,972.92

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Solution

The fourth proportional to 28,239.78, 42,373.59 and 19,972.92 is: 29,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.78 : 42,373.59 = 19,972.92 : x
  2. Step 2: Convert to fraction form
    28,239.78/42,373.59 = 19,972.92/x
  3. Step 3: Cross multiply
    28,239.78x = 42,373.59 × 19,972.92
  4. Step 4: Simplify right side
    28,239.78x = 846,324,323.18
  5. Step 5: Solve for x
    x = 846,324,323.18/28,239.78
  6. Step 6: Final answer
    x = 29,969.23

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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.