Home / 18,931.60-28,351.32-12,756.88

Finding the Fourth Proportional to 18,931.60, 28,351.32 and 12,756.88

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Solution

The fourth proportional to 18,931.60, 28,351.32 and 12,756.88 is: 19,104.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.60 : 28,351.32 = 12,756.88 : x
  2. Step 2: Convert to fraction form
    18,931.60/28,351.32 = 12,756.88/x
  3. Step 3: Cross multiply
    18,931.60x = 28,351.32 × 12,756.88
  4. Step 4: Simplify right side
    18,931.60x = 361,674,387.08
  5. Step 5: Solve for x
    x = 361,674,387.08/18,931.60
  6. Step 6: Final answer
    x = 19,104.27

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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.