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Finding the Fourth Proportional to 9,891.72, 13,653.18 and 6,867.06

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Solution

The fourth proportional to 9,891.72, 13,653.18 and 6,867.06 is: 9,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.72 : 13,653.18 = 6,867.06 : x
  2. Step 2: Convert to fraction form
    9,891.72/13,653.18 = 6,867.06/x
  3. Step 3: Cross multiply
    9,891.72x = 13,653.18 × 6,867.06
  4. Step 4: Simplify right side
    9,891.72x = 93,757,206.25
  5. Step 5: Solve for x
    x = 93,757,206.25/9,891.72
  6. Step 6: Final answer
    x = 9,478.35

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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.