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Finding the Fourth Proportional to 7,108.90, 9,807.11 and 4,123.01

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Solution

The fourth proportional to 7,108.90, 9,807.11 and 4,123.01 is: 5,687.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.90 : 9,807.11 = 4,123.01 : x
  2. Step 2: Convert to fraction form
    7,108.90/9,807.11 = 4,123.01/x
  3. Step 3: Cross multiply
    7,108.90x = 9,807.11 × 4,123.01
  4. Step 4: Simplify right side
    7,108.90x = 40,434,798.39
  5. Step 5: Solve for x
    x = 40,434,798.39/7,108.90
  6. Step 6: Final answer
    x = 5,687.91

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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.