Home / 20,702.92-28,570.14-11,271.55

Finding the Fourth Proportional to 20,702.92, 28,570.14 and 11,271.55

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Solution

The fourth proportional to 20,702.92, 28,570.14 and 11,271.55 is: 15,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.92 : 28,570.14 = 11,271.55 : x
  2. Step 2: Convert to fraction form
    20,702.92/28,570.14 = 11,271.55/x
  3. Step 3: Cross multiply
    20,702.92x = 28,570.14 × 11,271.55
  4. Step 4: Simplify right side
    20,702.92x = 322,029,761.52
  5. Step 5: Solve for x
    x = 322,029,761.52/20,702.92
  6. Step 6: Final answer
    x = 15,554.80

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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.