Home / 28,686.90-43,031.64-8,965.86

Finding the Fourth Proportional to 28,686.90, 43,031.64 and 8,965.86

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Solution

The fourth proportional to 28,686.90, 43,031.64 and 8,965.86 is: 13,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.90 : 43,031.64 = 8,965.86 : x
  2. Step 2: Convert to fraction form
    28,686.90/43,031.64 = 8,965.86/x
  3. Step 3: Cross multiply
    28,686.90x = 43,031.64 × 8,965.86
  4. Step 4: Simplify right side
    28,686.90x = 385,815,659.81
  5. Step 5: Solve for x
    x = 385,815,659.81/28,686.90
  6. Step 6: Final answer
    x = 13,449.19

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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.