Home / 28,161.60-38,863.20-15,586.08

Finding the Fourth Proportional to 28,161.60, 38,863.20 and 15,586.08

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Solution

The fourth proportional to 28,161.60, 38,863.20 and 15,586.08 is: 21,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161.60 : 38,863.20 = 15,586.08 : x
  2. Step 2: Convert to fraction form
    28,161.60/38,863.20 = 15,586.08/x
  3. Step 3: Cross multiply
    28,161.60x = 38,863.20 × 15,586.08
  4. Step 4: Simplify right side
    28,161.60x = 605,724,944.26
  5. Step 5: Solve for x
    x = 605,724,944.26/28,161.60
  6. Step 6: Final answer
    x = 21,508.90

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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.