Home / 38,680.91-53,382.60-21,686.70

Finding the Fourth Proportional to 38,680.91, 53,382.60 and 21,686.70

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Solution

The fourth proportional to 38,680.91, 53,382.60 and 21,686.70 is: 29,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,680.91 : 53,382.60 = 21,686.70 : x
  2. Step 2: Convert to fraction form
    38,680.91/53,382.60 = 21,686.70/x
  3. Step 3: Cross multiply
    38,680.91x = 53,382.60 × 21,686.70
  4. Step 4: Simplify right side
    38,680.91x = 1,157,692,431.42
  5. Step 5: Solve for x
    x = 1,157,692,431.42/38,680.91
  6. Step 6: Final answer
    x = 29,929.30

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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.