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Finding the Fourth Proportional to 7,720.91, 10,647.04 and 6,867.47

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Solution

The fourth proportional to 7,720.91, 10,647.04 and 6,867.47 is: 9,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.91 : 10,647.04 = 6,867.47 : x
  2. Step 2: Convert to fraction form
    7,720.91/10,647.04 = 6,867.47/x
  3. Step 3: Cross multiply
    7,720.91x = 10,647.04 × 6,867.47
  4. Step 4: Simplify right side
    7,720.91x = 73,118,227.79
  5. Step 5: Solve for x
    x = 73,118,227.79/7,720.91
  6. Step 6: Final answer
    x = 9,470.16

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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.