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Finding the Fourth Proportional to 8,567.40, 12,864.30 and 4,679.40

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Solution

The fourth proportional to 8,567.40, 12,864.30 and 4,679.40 is: 7,026.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,567.40 : 12,864.30 = 4,679.40 : x
  2. Step 2: Convert to fraction form
    8,567.40/12,864.30 = 4,679.40/x
  3. Step 3: Cross multiply
    8,567.40x = 12,864.30 × 4,679.40
  4. Step 4: Simplify right side
    8,567.40x = 60,197,205.42
  5. Step 5: Solve for x
    x = 60,197,205.42/8,567.40
  6. Step 6: Final answer
    x = 7,026.31

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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.