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Finding the Fourth Proportional to 6,618.99, 9,928.47 and 5,159.23

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Solution

The fourth proportional to 6,618.99, 9,928.47 and 5,159.23 is: 7,738.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.99 : 9,928.47 = 5,159.23 : x
  2. Step 2: Convert to fraction form
    6,618.99/9,928.47 = 5,159.23/x
  3. Step 3: Cross multiply
    6,618.99x = 9,928.47 × 5,159.23
  4. Step 4: Simplify right side
    6,618.99x = 51,223,260.28
  5. Step 5: Solve for x
    x = 51,223,260.28/6,618.99
  6. Step 6: Final answer
    x = 7,738.83

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.