Home / 20,070.57-30,112.84-8,978.43

Finding the Fourth Proportional to 20,070.57, 30,112.84 and 8,978.43

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Solution

The fourth proportional to 20,070.57, 30,112.84 and 8,978.43 is: 13,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,070.57 : 30,112.84 = 8,978.43 : x
  2. Step 2: Convert to fraction form
    20,070.57/30,112.84 = 8,978.43/x
  3. Step 3: Cross multiply
    20,070.57x = 30,112.84 × 8,978.43
  4. Step 4: Simplify right side
    20,070.57x = 270,366,026.04
  5. Step 5: Solve for x
    x = 270,366,026.04/20,070.57
  6. Step 6: Final answer
    x = 13,470.77

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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.