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Finding the Fourth Proportional to 7,108.40, 9,807.90 and 4,274.80

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Solution

The fourth proportional to 7,108.40, 9,807.90 and 4,274.80 is: 5,898.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.40 : 9,807.90 = 4,274.80 : x
  2. Step 2: Convert to fraction form
    7,108.40/9,807.90 = 4,274.80/x
  3. Step 3: Cross multiply
    7,108.40x = 9,807.90 × 4,274.80
  4. Step 4: Simplify right side
    7,108.40x = 41,926,810.92
  5. Step 5: Solve for x
    x = 41,926,810.92/7,108.40
  6. Step 6: Final answer
    x = 5,898.21

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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.