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Finding the Fourth Proportional to 7,079.90, 10,623.90 and 4,890.20

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Solution

The fourth proportional to 7,079.90, 10,623.90 and 4,890.20 is: 7,338.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,079.90 : 10,623.90 = 4,890.20 : x
  2. Step 2: Convert to fraction form
    7,079.90/10,623.90 = 4,890.20/x
  3. Step 3: Cross multiply
    7,079.90x = 10,623.90 × 4,890.20
  4. Step 4: Simplify right side
    7,079.90x = 51,952,995.78
  5. Step 5: Solve for x
    x = 51,952,995.78/7,079.90
  6. Step 6: Final answer
    x = 7,338.10

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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.