Home / 18,929.66-28,393.89-5,781.50

Finding the Fourth Proportional to 18,929.66, 28,393.89 and 5,781.50

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Solution

The fourth proportional to 18,929.66, 28,393.89 and 5,781.50 is: 8,672.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.66 : 28,393.89 = 5,781.50 : x
  2. Step 2: Convert to fraction form
    18,929.66/28,393.89 = 5,781.50/x
  3. Step 3: Cross multiply
    18,929.66x = 28,393.89 × 5,781.50
  4. Step 4: Simplify right side
    18,929.66x = 164,159,275.04
  5. Step 5: Solve for x
    x = 164,159,275.04/18,929.66
  6. Step 6: Final answer
    x = 8,672.07

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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.