Home / 7,320.20-10,981.10-7,089.80

Finding the Fourth Proportional to 7,320.20, 10,981.10 and 7,089.80

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Solution

The fourth proportional to 7,320.20, 10,981.10 and 7,089.80 is: 10,635.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,320.20 : 10,981.10 = 7,089.80 : x
  2. Step 2: Convert to fraction form
    7,320.20/10,981.10 = 7,089.80/x
  3. Step 3: Cross multiply
    7,320.20x = 10,981.10 × 7,089.80
  4. Step 4: Simplify right side
    7,320.20x = 77,853,802.78
  5. Step 5: Solve for x
    x = 77,853,802.78/7,320.20
  6. Step 6: Final answer
    x = 10,635.47

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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.