Home / 28,753.20-39,680.30-15,657.06

Finding the Fourth Proportional to 28,753.20, 39,680.30 and 15,657.06

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Solution

The fourth proportional to 28,753.20, 39,680.30 and 15,657.06 is: 21,607.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,753.20 : 39,680.30 = 15,657.06 : x
  2. Step 2: Convert to fraction form
    28,753.20/39,680.30 = 15,657.06/x
  3. Step 3: Cross multiply
    28,753.20x = 39,680.30 × 15,657.06
  4. Step 4: Simplify right side
    28,753.20x = 621,276,759.63
  5. Step 5: Solve for x
    x = 621,276,759.63/28,753.20
  6. Step 6: Final answer
    x = 21,607.22

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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.