Home / 8,378.82-12,545.28-6,421.86

Finding the Fourth Proportional to 8,378.82, 12,545.28 and 6,421.86

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Solution

The fourth proportional to 8,378.82, 12,545.28 and 6,421.86 is: 9,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.82 : 12,545.28 = 6,421.86 : x
  2. Step 2: Convert to fraction form
    8,378.82/12,545.28 = 6,421.86/x
  3. Step 3: Cross multiply
    8,378.82x = 12,545.28 × 6,421.86
  4. Step 4: Simplify right side
    8,378.82x = 80,564,031.82
  5. Step 5: Solve for x
    x = 80,564,031.82/8,378.82
  6. Step 6: Final answer
    x = 9,615.20

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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.