Home / 28,489.28-42,755.52-12,917.60

Finding the Fourth Proportional to 28,489.28, 42,755.52 and 12,917.60

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Solution

The fourth proportional to 28,489.28, 42,755.52 and 12,917.60 is: 19,386.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.28 : 42,755.52 = 12,917.60 : x
  2. Step 2: Convert to fraction form
    28,489.28/42,755.52 = 12,917.60/x
  3. Step 3: Cross multiply
    28,489.28x = 42,755.52 × 12,917.60
  4. Step 4: Simplify right side
    28,489.28x = 552,298,705.15
  5. Step 5: Solve for x
    x = 552,298,705.15/28,489.28
  6. Step 6: Final answer
    x = 19,386.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.