Home / 7,089.89-9,787.28-4,105.13

Finding the Fourth Proportional to 7,089.89, 9,787.28 and 4,105.13

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Solution

The fourth proportional to 7,089.89, 9,787.28 and 4,105.13 is: 5,666.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,089.89 : 9,787.28 = 4,105.13 : x
  2. Step 2: Convert to fraction form
    7,089.89/9,787.28 = 4,105.13/x
  3. Step 3: Cross multiply
    7,089.89x = 9,787.28 × 4,105.13
  4. Step 4: Simplify right side
    7,089.89x = 40,177,987.28
  5. Step 5: Solve for x
    x = 40,177,987.28/7,089.89
  6. Step 6: Final answer
    x = 5,666.94

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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.