Home / 8,518.55-12,780-5,011.46

Finding the Fourth Proportional to 8,518.55, 12,780 and 5,011.46

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Solution

The fourth proportional to 8,518.55, 12,780 and 5,011.46 is: 7,518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.55 : 12,780 = 5,011.46 : x
  2. Step 2: Convert to fraction form
    8,518.55/12,780 = 5,011.46/x
  3. Step 3: Cross multiply
    8,518.55x = 12,780 × 5,011.46
  4. Step 4: Simplify right side
    8,518.55x = 64,046,394.90
  5. Step 5: Solve for x
    x = 64,046,394.90/8,518.55
  6. Step 6: Final answer
    x = 7,518.47

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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.