Home / 28,342.78-39,113.07-15,767.53

Finding the Fourth Proportional to 28,342.78, 39,113.07 and 15,767.53

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Solution

The fourth proportional to 28,342.78, 39,113.07 and 15,767.53 is: 21,759.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,342.78 : 39,113.07 = 15,767.53 : x
  2. Step 2: Convert to fraction form
    28,342.78/39,113.07 = 15,767.53/x
  3. Step 3: Cross multiply
    28,342.78x = 39,113.07 × 15,767.53
  4. Step 4: Simplify right side
    28,342.78x = 616,716,309.05
  5. Step 5: Solve for x
    x = 616,716,309.05/28,342.78
  6. Step 6: Final answer
    x = 21,759.21

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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.