Home / 20,886.29-31,337.64-9,191.31

Finding the Fourth Proportional to 20,886.29, 31,337.64 and 9,191.31

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Solution

The fourth proportional to 20,886.29, 31,337.64 and 9,191.31 is: 13,790.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.29 : 31,337.64 = 9,191.31 : x
  2. Step 2: Convert to fraction form
    20,886.29/31,337.64 = 9,191.31/x
  3. Step 3: Cross multiply
    20,886.29x = 31,337.64 × 9,191.31
  4. Step 4: Simplify right side
    20,886.29x = 288,033,772.75
  5. Step 5: Solve for x
    x = 288,033,772.75/20,886.29
  6. Step 6: Final answer
    x = 13,790.57

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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.