Home / 20,715.88-31,086.60-9,030.12

Finding the Fourth Proportional to 20,715.88, 31,086.60 and 9,030.12

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Solution

The fourth proportional to 20,715.88, 31,086.60 and 9,030.12 is: 13,550.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.88 : 31,086.60 = 9,030.12 : x
  2. Step 2: Convert to fraction form
    20,715.88/31,086.60 = 9,030.12/x
  3. Step 3: Cross multiply
    20,715.88x = 31,086.60 × 9,030.12
  4. Step 4: Simplify right side
    20,715.88x = 280,715,728.39
  5. Step 5: Solve for x
    x = 280,715,728.39/20,715.88
  6. Step 6: Final answer
    x = 13,550.75

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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.