Home / 28,490.88-39,318.96-15,915.60

Finding the Fourth Proportional to 28,490.88, 39,318.96 and 15,915.60

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Solution

The fourth proportional to 28,490.88, 39,318.96 and 15,915.60 is: 21,964.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.88 : 39,318.96 = 15,915.60 : x
  2. Step 2: Convert to fraction form
    28,490.88/39,318.96 = 15,915.60/x
  3. Step 3: Cross multiply
    28,490.88x = 39,318.96 × 15,915.60
  4. Step 4: Simplify right side
    28,490.88x = 625,784,839.78
  5. Step 5: Solve for x
    x = 625,784,839.78/28,490.88
  6. Step 6: Final answer
    x = 21,964.39

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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.