Home / 28,490.88-39,317.52-15,915.84

Finding the Fourth Proportional to 28,490.88, 39,317.52 and 15,915.84

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Solution

The fourth proportional to 28,490.88, 39,317.52 and 15,915.84 is: 21,963.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.88 : 39,317.52 = 15,915.84 : x
  2. Step 2: Convert to fraction form
    28,490.88/39,317.52 = 15,915.84/x
  3. Step 3: Cross multiply
    28,490.88x = 39,317.52 × 15,915.84
  4. Step 4: Simplify right side
    28,490.88x = 625,771,357.52
  5. Step 5: Solve for x
    x = 625,771,357.52/28,490.88
  6. Step 6: Final answer
    x = 21,963.92

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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.