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Finding the Fourth Proportional to 9,378.32, 12,914.22 and 6,721.16

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Solution

The fourth proportional to 9,378.32, 12,914.22 and 6,721.16 is: 9,255.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.32 : 12,914.22 = 6,721.16 : x
  2. Step 2: Convert to fraction form
    9,378.32/12,914.22 = 6,721.16/x
  3. Step 3: Cross multiply
    9,378.32x = 12,914.22 × 6,721.16
  4. Step 4: Simplify right side
    9,378.32x = 86,798,538.90
  5. Step 5: Solve for x
    x = 86,798,538.90/9,378.32
  6. Step 6: Final answer
    x = 9,255.23

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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.