Home / 28,188.08-38,899.60-15,612.56

Finding the Fourth Proportional to 28,188.08, 38,899.60 and 15,612.56

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Solution

The fourth proportional to 28,188.08, 38,899.60 and 15,612.56 is: 21,545.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.08 : 38,899.60 = 15,612.56 : x
  2. Step 2: Convert to fraction form
    28,188.08/38,899.60 = 15,612.56/x
  3. Step 3: Cross multiply
    28,188.08x = 38,899.60 × 15,612.56
  4. Step 4: Simplify right side
    28,188.08x = 607,322,338.98
  5. Step 5: Solve for x
    x = 607,322,338.98/28,188.08
  6. Step 6: Final answer
    x = 21,545.36

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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.