Home / 20,901.12-31,350.47-6,109.71

Finding the Fourth Proportional to 20,901.12, 31,350.47 and 6,109.71

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Solution

The fourth proportional to 20,901.12, 31,350.47 and 6,109.71 is: 9,164.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.12 : 31,350.47 = 6,109.71 : x
  2. Step 2: Convert to fraction form
    20,901.12/31,350.47 = 6,109.71/x
  3. Step 3: Cross multiply
    20,901.12x = 31,350.47 × 6,109.71
  4. Step 4: Simplify right side
    20,901.12x = 191,542,249.52
  5. Step 5: Solve for x
    x = 191,542,249.52/20,901.12
  6. Step 6: Final answer
    x = 9,164.21

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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.