Home / 39,657.89-54,728.19-21,752.71

Finding the Fourth Proportional to 39,657.89, 54,728.19 and 21,752.71

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Solution

The fourth proportional to 39,657.89, 54,728.19 and 21,752.71 is: 30,018.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.89 : 54,728.19 = 21,752.71 : x
  2. Step 2: Convert to fraction form
    39,657.89/54,728.19 = 21,752.71/x
  3. Step 3: Cross multiply
    39,657.89x = 54,728.19 × 21,752.71
  4. Step 4: Simplify right side
    39,657.89x = 1,190,486,309.07
  5. Step 5: Solve for x
    x = 1,190,486,309.07/39,657.89
  6. Step 6: Final answer
    x = 30,018.90

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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.