Home / 5,112.30-7,668.45-4,990.80

Finding the Fourth Proportional to 5,112.30, 7,668.45 and 4,990.80

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Solution

The fourth proportional to 5,112.30, 7,668.45 and 4,990.80 is: 7,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,112.30 : 7,668.45 = 4,990.80 : x
  2. Step 2: Convert to fraction form
    5,112.30/7,668.45 = 4,990.80/x
  3. Step 3: Cross multiply
    5,112.30x = 7,668.45 × 4,990.80
  4. Step 4: Simplify right side
    5,112.30x = 38,271,700.26
  5. Step 5: Solve for x
    x = 38,271,700.26/5,112.30
  6. Step 6: Final answer
    x = 7,486.20

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1.5x scale

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.