Home / 7,981.81-11,968.61-4,287.15

Finding the Fourth Proportional to 7,981.81, 11,968.61 and 4,287.15

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Solution

The fourth proportional to 7,981.81, 11,968.61 and 4,287.15 is: 6,428.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.81 : 11,968.61 = 4,287.15 : x
  2. Step 2: Convert to fraction form
    7,981.81/11,968.61 = 4,287.15/x
  3. Step 3: Cross multiply
    7,981.81x = 11,968.61 × 4,287.15
  4. Step 4: Simplify right side
    7,981.81x = 51,311,192.20
  5. Step 5: Solve for x
    x = 51,311,192.20/7,981.81
  6. Step 6: Final answer
    x = 6,428.51

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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.