Home / 6,988.80-10,491.30-4,218.60

Finding the Fourth Proportional to 6,988.80, 10,491.30 and 4,218.60

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Solution

The fourth proportional to 6,988.80, 10,491.30 and 4,218.60 is: 6,332.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.80 : 10,491.30 = 4,218.60 : x
  2. Step 2: Convert to fraction form
    6,988.80/10,491.30 = 4,218.60/x
  3. Step 3: Cross multiply
    6,988.80x = 10,491.30 × 4,218.60
  4. Step 4: Simplify right side
    6,988.80x = 44,258,598.18
  5. Step 5: Solve for x
    x = 44,258,598.18/6,988.80
  6. Step 6: Final answer
    x = 6,332.79

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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.