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Finding the Fourth Proportional to 7,168.13, 9,870.59 and 6,645.41

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Solution

The fourth proportional to 7,168.13, 9,870.59 and 6,645.41 is: 9,150.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,168.13 : 9,870.59 = 6,645.41 : x
  2. Step 2: Convert to fraction form
    7,168.13/9,870.59 = 6,645.41/x
  3. Step 3: Cross multiply
    7,168.13x = 9,870.59 × 6,645.41
  4. Step 4: Simplify right side
    7,168.13x = 65,594,084.26
  5. Step 5: Solve for x
    x = 65,594,084.26/7,168.13
  6. Step 6: Final answer
    x = 9,150.79

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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.