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Finding the Fourth Proportional to 28,146.92, 38,841.14 and 15,570.92

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Solution

The fourth proportional to 28,146.92, 38,841.14 and 15,570.92 is: 21,486.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146.92 : 38,841.14 = 15,570.92 : x
  2. Step 2: Convert to fraction form
    28,146.92/38,841.14 = 15,570.92/x
  3. Step 3: Cross multiply
    28,146.92x = 38,841.14 × 15,570.92
  4. Step 4: Simplify right side
    28,146.92x = 604,792,283.65
  5. Step 5: Solve for x
    x = 604,792,283.65/28,146.92
  6. Step 6: Final answer
    x = 21,486.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.