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Finding the Fourth Proportional to 8,925.39, 12,315.65 and 5,148.70

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Solution

The fourth proportional to 8,925.39, 12,315.65 and 5,148.70 is: 7,104.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,925.39 : 12,315.65 = 5,148.70 : x
  2. Step 2: Convert to fraction form
    8,925.39/12,315.65 = 5,148.70/x
  3. Step 3: Cross multiply
    8,925.39x = 12,315.65 × 5,148.70
  4. Step 4: Simplify right side
    8,925.39x = 63,409,530.62
  5. Step 5: Solve for x
    x = 63,409,530.62/8,925.39
  6. Step 6: Final answer
    x = 7,104.40

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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.