Home / 20,447.12-30,665.80-5,655.72

Finding the Fourth Proportional to 20,447.12, 30,665.80 and 5,655.72

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Solution

The fourth proportional to 20,447.12, 30,665.80 and 5,655.72 is: 8,482.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.12 : 30,665.80 = 5,655.72 : x
  2. Step 2: Convert to fraction form
    20,447.12/30,665.80 = 5,655.72/x
  3. Step 3: Cross multiply
    20,447.12x = 30,665.80 × 5,655.72
  4. Step 4: Simplify right side
    20,447.12x = 173,437,178.38
  5. Step 5: Solve for x
    x = 173,437,178.38/20,447.12
  6. Step 6: Final answer
    x = 8,482.23

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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.