Home / 25,779.96-38,677.20-9,989.76

Finding the Fourth Proportional to 25,779.96, 38,677.20 and 9,989.76

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Solution

The fourth proportional to 25,779.96, 38,677.20 and 9,989.76 is: 14,987.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,779.96 : 38,677.20 = 9,989.76 : x
  2. Step 2: Convert to fraction form
    25,779.96/38,677.20 = 9,989.76/x
  3. Step 3: Cross multiply
    25,779.96x = 38,677.20 × 9,989.76
  4. Step 4: Simplify right side
    25,779.96x = 386,375,945.47
  5. Step 5: Solve for x
    x = 386,375,945.47/25,779.96
  6. Step 6: Final answer
    x = 14,987.45

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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.