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Finding the Fourth Proportional to 8,708.04, 12,011.62 and 5,168.76

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Solution

The fourth proportional to 8,708.04, 12,011.62 and 5,168.76 is: 7,129.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.04 : 12,011.62 = 5,168.76 : x
  2. Step 2: Convert to fraction form
    8,708.04/12,011.62 = 5,168.76/x
  3. Step 3: Cross multiply
    8,708.04x = 12,011.62 × 5,168.76
  4. Step 4: Simplify right side
    8,708.04x = 62,085,180.99
  5. Step 5: Solve for x
    x = 62,085,180.99/8,708.04
  6. Step 6: Final answer
    x = 7,129.64

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Half scale
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Double scale
Find fourth proportional to 8,709.04, 12,013 and 5,169.76
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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.