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Finding the Fourth Proportional to 7,061.99, 9,716.76 and 6,478.79

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Solution

The fourth proportional to 7,061.99, 9,716.76 and 6,478.79 is: 8,914.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,061.99 : 9,716.76 = 6,478.79 : x
  2. Step 2: Convert to fraction form
    7,061.99/9,716.76 = 6,478.79/x
  3. Step 3: Cross multiply
    7,061.99x = 9,716.76 × 6,478.79
  4. Step 4: Simplify right side
    7,061.99x = 62,952,798.94
  5. Step 5: Solve for x
    x = 62,952,798.94/7,061.99
  6. Step 6: Final answer
    x = 8,914.32

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Half scale
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Double scale
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Similar ratio
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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.