Home / 39,759.47-54,868.38-21,854.78

Finding the Fourth Proportional to 39,759.47, 54,868.38 and 21,854.78

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Solution

The fourth proportional to 39,759.47, 54,868.38 and 21,854.78 is: 30,159.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.47 : 54,868.38 = 21,854.78 : x
  2. Step 2: Convert to fraction form
    39,759.47/54,868.38 = 21,854.78/x
  3. Step 3: Cross multiply
    39,759.47x = 54,868.38 × 21,854.78
  4. Step 4: Simplify right side
    39,759.47x = 1,199,136,099.51
  5. Step 5: Solve for x
    x = 1,199,136,099.51/39,759.47
  6. Step 6: Final answer
    x = 30,159.76

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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.