Home / 28,490.28-39,315.83-15,915.03

Finding the Fourth Proportional to 28,490.28, 39,315.83 and 15,915.03

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Solution

The fourth proportional to 28,490.28, 39,315.83 and 15,915.03 is: 21,962.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.28 : 39,315.83 = 15,915.03 : x
  2. Step 2: Convert to fraction form
    28,490.28/39,315.83 = 15,915.03/x
  3. Step 3: Cross multiply
    28,490.28x = 39,315.83 × 15,915.03
  4. Step 4: Simplify right side
    28,490.28x = 625,712,534.35
  5. Step 5: Solve for x
    x = 625,712,534.35/28,490.28
  6. Step 6: Final answer
    x = 21,962.32

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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.