Home / 39,242.75-54,151.47-21,780.53

Finding the Fourth Proportional to 39,242.75, 54,151.47 and 21,780.53

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Solution

The fourth proportional to 39,242.75, 54,151.47 and 21,780.53 is: 30,055.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,242.75 : 54,151.47 = 21,780.53 : x
  2. Step 2: Convert to fraction form
    39,242.75/54,151.47 = 21,780.53/x
  3. Step 3: Cross multiply
    39,242.75x = 54,151.47 × 21,780.53
  4. Step 4: Simplify right side
    39,242.75x = 1,179,447,649.19
  5. Step 5: Solve for x
    x = 1,179,447,649.19/39,242.75
  6. Step 6: Final answer
    x = 30,055.18

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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.