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Finding the Fourth Proportional to 8,339.72, 12,507.62 and 3,071.87

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Solution

The fourth proportional to 8,339.72, 12,507.62 and 3,071.87 is: 4,607.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,339.72 : 12,507.62 = 3,071.87 : x
  2. Step 2: Convert to fraction form
    8,339.72/12,507.62 = 3,071.87/x
  3. Step 3: Cross multiply
    8,339.72x = 12,507.62 × 3,071.87
  4. Step 4: Simplify right side
    8,339.72x = 38,421,760.45
  5. Step 5: Solve for x
    x = 38,421,760.45/8,339.72
  6. Step 6: Final answer
    x = 4,607.08

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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.