Home / 20,278.08-30,434.40-11,945.88

Finding the Fourth Proportional to 20,278.08, 30,434.40 and 11,945.88

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Solution

The fourth proportional to 20,278.08, 30,434.40 and 11,945.88 is: 17,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.08 : 30,434.40 = 11,945.88 : x
  2. Step 2: Convert to fraction form
    20,278.08/30,434.40 = 11,945.88/x
  3. Step 3: Cross multiply
    20,278.08x = 30,434.40 × 11,945.88
  4. Step 4: Simplify right side
    20,278.08x = 363,565,690.27
  5. Step 5: Solve for x
    x = 363,565,690.27/20,278.08
  6. Step 6: Final answer
    x = 17,929.00

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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.