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Finding the Fourth Proportional to 28,510.20, 42,838.20 and 25,302.60

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Solution

The fourth proportional to 28,510.20, 42,838.20 and 25,302.60 is: 38,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.20 : 42,838.20 = 25,302.60 : x
  2. Step 2: Convert to fraction form
    28,510.20/42,838.20 = 25,302.60/x
  3. Step 3: Cross multiply
    28,510.20x = 42,838.20 × 25,302.60
  4. Step 4: Simplify right side
    28,510.20x = 1,083,917,839.32
  5. Step 5: Solve for x
    x = 1,083,917,839.32/28,510.20
  6. Step 6: Final answer
    x = 38,018.60

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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.