Home / 20,799.20-31,180.08-7,642.64

Finding the Fourth Proportional to 20,799.20, 31,180.08 and 7,642.64

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Solution

The fourth proportional to 20,799.20, 31,180.08 and 7,642.64 is: 11,457.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.20 : 31,180.08 = 7,642.64 : x
  2. Step 2: Convert to fraction form
    20,799.20/31,180.08 = 7,642.64/x
  3. Step 3: Cross multiply
    20,799.20x = 31,180.08 × 7,642.64
  4. Step 4: Simplify right side
    20,799.20x = 238,298,126.61
  5. Step 5: Solve for x
    x = 238,298,126.61/20,799.20
  6. Step 6: Final answer
    x = 11,457.08

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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.