Home / 28,200.42-38,917.17-15,625.20

Finding the Fourth Proportional to 28,200.42, 38,917.17 and 15,625.20

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Solution

The fourth proportional to 28,200.42, 38,917.17 and 15,625.20 is: 21,563.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.42 : 38,917.17 = 15,625.20 : x
  2. Step 2: Convert to fraction form
    28,200.42/38,917.17 = 15,625.20/x
  3. Step 3: Cross multiply
    28,200.42x = 38,917.17 × 15,625.20
  4. Step 4: Simplify right side
    28,200.42x = 608,088,564.68
  5. Step 5: Solve for x
    x = 608,088,564.68/28,200.42
  6. Step 6: Final answer
    x = 21,563.10

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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.