Home / 8,655.48-12,981.39-3,109.14

Finding the Fourth Proportional to 8,655.48, 12,981.39 and 3,109.14

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Solution

The fourth proportional to 8,655.48, 12,981.39 and 3,109.14 is: 4,663.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.48 : 12,981.39 = 3,109.14 : x
  2. Step 2: Convert to fraction form
    8,655.48/12,981.39 = 3,109.14/x
  3. Step 3: Cross multiply
    8,655.48x = 12,981.39 × 3,109.14
  4. Step 4: Simplify right side
    8,655.48x = 40,360,958.90
  5. Step 5: Solve for x
    x = 40,360,958.90/8,655.48
  6. Step 6: Final answer
    x = 4,663.05

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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.