Home / 18,988.74-28,479.78-5,134.50

Finding the Fourth Proportional to 18,988.74, 28,479.78 and 5,134.50

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Solution

The fourth proportional to 18,988.74, 28,479.78 and 5,134.50 is: 7,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.74 : 28,479.78 = 5,134.50 : x
  2. Step 2: Convert to fraction form
    18,988.74/28,479.78 = 5,134.50/x
  3. Step 3: Cross multiply
    18,988.74x = 28,479.78 × 5,134.50
  4. Step 4: Simplify right side
    18,988.74x = 146,229,430.41
  5. Step 5: Solve for x
    x = 146,229,430.41/18,988.74
  6. Step 6: Final answer
    x = 7,700.85

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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.