Home / 20,897.81-28,876.34-15,541.88

Finding the Fourth Proportional to 20,897.81, 28,876.34 and 15,541.88

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Solution

The fourth proportional to 20,897.81, 28,876.34 and 15,541.88 is: 21,475.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.81 : 28,876.34 = 15,541.88 : x
  2. Step 2: Convert to fraction form
    20,897.81/28,876.34 = 15,541.88/x
  3. Step 3: Cross multiply
    20,897.81x = 28,876.34 × 15,541.88
  4. Step 4: Simplify right side
    20,897.81x = 448,792,726.57
  5. Step 5: Solve for x
    x = 448,792,726.57/20,897.81
  6. Step 6: Final answer
    x = 21,475.59

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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.