Home / 20,891.30-31,345.14-9,196.32

Finding the Fourth Proportional to 20,891.30, 31,345.14 and 9,196.32

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Solution

The fourth proportional to 20,891.30, 31,345.14 and 9,196.32 is: 13,798.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.30 : 31,345.14 = 9,196.32 : x
  2. Step 2: Convert to fraction form
    20,891.30/31,345.14 = 9,196.32/x
  3. Step 3: Cross multiply
    20,891.30x = 31,345.14 × 9,196.32
  4. Step 4: Simplify right side
    20,891.30x = 288,259,937.88
  5. Step 5: Solve for x
    x = 288,259,937.88/20,891.30
  6. Step 6: Final answer
    x = 13,798.09

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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.