Home / 20,702.74-28,569.90-11,271.28

Finding the Fourth Proportional to 20,702.74, 28,569.90 and 11,271.28

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Solution

The fourth proportional to 20,702.74, 28,569.90 and 11,271.28 is: 15,554.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.74 : 28,569.90 = 11,271.28 : x
  2. Step 2: Convert to fraction form
    20,702.74/28,569.90 = 11,271.28/x
  3. Step 3: Cross multiply
    20,702.74x = 28,569.90 × 11,271.28
  4. Step 4: Simplify right side
    20,702.74x = 322,019,342.47
  5. Step 5: Solve for x
    x = 322,019,342.47/20,702.74
  6. Step 6: Final answer
    x = 15,554.43

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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.