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Finding the Fourth Proportional to 28,062.50, 38,726.79 and 15,486.98

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Solution

The fourth proportional to 28,062.50, 38,726.79 and 15,486.98 is: 21,372.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,062.50 : 38,726.79 = 15,486.98 : x
  2. Step 2: Convert to fraction form
    28,062.50/38,726.79 = 15,486.98/x
  3. Step 3: Cross multiply
    28,062.50x = 38,726.79 × 15,486.98
  4. Step 4: Simplify right side
    28,062.50x = 599,761,022.19
  5. Step 5: Solve for x
    x = 599,761,022.19/28,062.50
  6. Step 6: Final answer
    x = 21,372.33

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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.