Home / 2,988.62-4,122.90-1,926.12

Finding the Fourth Proportional to 2,988.62, 4,122.90 and 1,926.12

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Solution

The fourth proportional to 2,988.62, 4,122.90 and 1,926.12 is: 2,657.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.62 : 4,122.90 = 1,926.12 : x
  2. Step 2: Convert to fraction form
    2,988.62/4,122.90 = 1,926.12/x
  3. Step 3: Cross multiply
    2,988.62x = 4,122.90 × 1,926.12
  4. Step 4: Simplify right side
    2,988.62x = 7,941,200.15
  5. Step 5: Solve for x
    x = 7,941,200.15/2,988.62
  6. Step 6: Final answer
    x = 2,657.15

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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.