Home / 20,899.80-31,357.86-9,204.82

Finding the Fourth Proportional to 20,899.80, 31,357.86 and 9,204.82

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Solution

The fourth proportional to 20,899.80, 31,357.86 and 9,204.82 is: 13,810.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.80 : 31,357.86 = 9,204.82 : x
  2. Step 2: Convert to fraction form
    20,899.80/31,357.86 = 9,204.82/x
  3. Step 3: Cross multiply
    20,899.80x = 31,357.86 × 9,204.82
  4. Step 4: Simplify right side
    20,899.80x = 288,643,378.49
  5. Step 5: Solve for x
    x = 288,643,378.49/20,899.80
  6. Step 6: Final answer
    x = 13,810.82

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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.