Home / 20,702.17-28,554.49-12,748.78

Finding the Fourth Proportional to 20,702.17, 28,554.49 and 12,748.78

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Solution

The fourth proportional to 20,702.17, 28,554.49 and 12,748.78 is: 17,584.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.17 : 28,554.49 = 12,748.78 : x
  2. Step 2: Convert to fraction form
    20,702.17/28,554.49 = 12,748.78/x
  3. Step 3: Cross multiply
    20,702.17x = 28,554.49 × 12,748.78
  4. Step 4: Simplify right side
    20,702.17x = 364,034,911.02
  5. Step 5: Solve for x
    x = 364,034,911.02/20,702.17
  6. Step 6: Final answer
    x = 17,584.38

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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.