Home / 6,642.45-9,164.61-3,988.89

Finding the Fourth Proportional to 6,642.45, 9,164.61 and 3,988.89

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Solution

The fourth proportional to 6,642.45, 9,164.61 and 3,988.89 is: 5,503.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642.45 : 9,164.61 = 3,988.89 : x
  2. Step 2: Convert to fraction form
    6,642.45/9,164.61 = 3,988.89/x
  3. Step 3: Cross multiply
    6,642.45x = 9,164.61 × 3,988.89
  4. Step 4: Simplify right side
    6,642.45x = 36,556,621.18
  5. Step 5: Solve for x
    x = 36,556,621.18/6,642.45
  6. Step 6: Final answer
    x = 5,503.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.