Home / 20,702.39-28,569.81-11,271.47

Finding the Fourth Proportional to 20,702.39, 28,569.81 and 11,271.47

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Solution

The fourth proportional to 20,702.39, 28,569.81 and 11,271.47 is: 15,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.39 : 28,569.81 = 11,271.47 : x
  2. Step 2: Convert to fraction form
    20,702.39/28,569.81 = 11,271.47/x
  3. Step 3: Cross multiply
    20,702.39x = 28,569.81 × 11,271.47
  4. Step 4: Simplify right side
    20,702.39x = 322,023,557.11
  5. Step 5: Solve for x
    x = 322,023,557.11/20,702.39
  6. Step 6: Final answer
    x = 15,554.90

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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.