Home / 28,187.95-38,899.29-15,612.70

Finding the Fourth Proportional to 28,187.95, 38,899.29 and 15,612.70

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Solution

The fourth proportional to 28,187.95, 38,899.29 and 15,612.70 is: 21,545.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.95 : 38,899.29 = 15,612.70 : x
  2. Step 2: Convert to fraction form
    28,187.95/38,899.29 = 15,612.70/x
  3. Step 3: Cross multiply
    28,187.95x = 38,899.29 × 15,612.70
  4. Step 4: Simplify right side
    28,187.95x = 607,322,944.98
  5. Step 5: Solve for x
    x = 607,322,944.98/28,187.95
  6. Step 6: Final answer
    x = 21,545.48

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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.