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Finding the Fourth Proportional to 8,289.39, 12,434.08 and 7,929.45

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Solution

The fourth proportional to 8,289.39, 12,434.08 and 7,929.45 is: 11,894.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,289.39 : 12,434.08 = 7,929.45 : x
  2. Step 2: Convert to fraction form
    8,289.39/12,434.08 = 7,929.45/x
  3. Step 3: Cross multiply
    8,289.39x = 12,434.08 × 7,929.45
  4. Step 4: Simplify right side
    8,289.39x = 98,595,373.31
  5. Step 5: Solve for x
    x = 98,595,373.31/8,289.39
  6. Step 6: Final answer
    x = 11,894.17

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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.