Home / 28,225.20-38,944.92-15,647.28

Finding the Fourth Proportional to 28,225.20, 38,944.92 and 15,647.28

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Solution

The fourth proportional to 28,225.20, 38,944.92 and 15,647.28 is: 21,590.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,225.20 : 38,944.92 = 15,647.28 : x
  2. Step 2: Convert to fraction form
    28,225.20/38,944.92 = 15,647.28/x
  3. Step 3: Cross multiply
    28,225.20x = 38,944.92 × 15,647.28
  4. Step 4: Simplify right side
    28,225.20x = 609,382,067.82
  5. Step 5: Solve for x
    x = 609,382,067.82/28,225.20
  6. Step 6: Final answer
    x = 21,590.00

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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.