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Finding the Fourth Proportional to 11,345.94, 15,655.05 and 6,869.97

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Solution

The fourth proportional to 11,345.94, 15,655.05 and 6,869.97 is: 9,479.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,345.94 : 15,655.05 = 6,869.97 : x
  2. Step 2: Convert to fraction form
    11,345.94/15,655.05 = 6,869.97/x
  3. Step 3: Cross multiply
    11,345.94x = 15,655.05 × 6,869.97
  4. Step 4: Simplify right side
    11,345.94x = 107,549,723.85
  5. Step 5: Solve for x
    x = 107,549,723.85/11,345.94
  6. Step 6: Final answer
    x = 9,479.14

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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.