Home / 13,011.20-19,531.20-8,086.40

Finding the Fourth Proportional to 13,011.20, 19,531.20 and 8,086.40

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Solution

The fourth proportional to 13,011.20, 19,531.20 and 8,086.40 is: 12,138.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,011.20 : 19,531.20 = 8,086.40 : x
  2. Step 2: Convert to fraction form
    13,011.20/19,531.20 = 8,086.40/x
  3. Step 3: Cross multiply
    13,011.20x = 19,531.20 × 8,086.40
  4. Step 4: Simplify right side
    13,011.20x = 157,937,095.68
  5. Step 5: Solve for x
    x = 157,937,095.68/13,011.20
  6. Step 6: Final answer
    x = 12,138.55

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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.