Home / 20,702.57-31,053.49-5,120.19

Finding the Fourth Proportional to 20,702.57, 31,053.49 and 5,120.19

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Solution

The fourth proportional to 20,702.57, 31,053.49 and 5,120.19 is: 7,680.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.57 : 31,053.49 = 5,120.19 : x
  2. Step 2: Convert to fraction form
    20,702.57/31,053.49 = 5,120.19/x
  3. Step 3: Cross multiply
    20,702.57x = 31,053.49 × 5,120.19
  4. Step 4: Simplify right side
    20,702.57x = 158,999,756.16
  5. Step 5: Solve for x
    x = 158,999,756.16/20,702.57
  6. Step 6: Final answer
    x = 7,680.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.