Home / 7,275.48-10,918-3,990.88

Finding the Fourth Proportional to 7,275.48, 10,918 and 3,990.88

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Solution

The fourth proportional to 7,275.48, 10,918 and 3,990.88 is: 5,988.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,275.48 : 10,918 = 3,990.88 : x
  2. Step 2: Convert to fraction form
    7,275.48/10,918 = 3,990.88/x
  3. Step 3: Cross multiply
    7,275.48x = 10,918 × 3,990.88
  4. Step 4: Simplify right side
    7,275.48x = 43,572,427.84
  5. Step 5: Solve for x
    x = 43,572,427.84/7,275.48
  6. Step 6: Final answer
    x = 5,988.94

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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.