Home / 28,621.28-39,495.80-15,872.90

Finding the Fourth Proportional to 28,621.28, 39,495.80 and 15,872.90

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Solution

The fourth proportional to 28,621.28, 39,495.80 and 15,872.90 is: 21,903.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,621.28 : 39,495.80 = 15,872.90 : x
  2. Step 2: Convert to fraction form
    28,621.28/39,495.80 = 15,872.90/x
  3. Step 3: Cross multiply
    28,621.28x = 39,495.80 × 15,872.90
  4. Step 4: Simplify right side
    28,621.28x = 626,912,726.02
  5. Step 5: Solve for x
    x = 626,912,726.02/28,621.28
  6. Step 6: Final answer
    x = 21,903.73

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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.