Home / 13,440.13-20,164.75-6,864.55

Finding the Fourth Proportional to 13,440.13, 20,164.75 and 6,864.55

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Solution

The fourth proportional to 13,440.13, 20,164.75 and 6,864.55 is: 10,299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.13 : 20,164.75 = 6,864.55 : x
  2. Step 2: Convert to fraction form
    13,440.13/20,164.75 = 6,864.55/x
  3. Step 3: Cross multiply
    13,440.13x = 20,164.75 × 6,864.55
  4. Step 4: Simplify right side
    13,440.13x = 138,421,867.04
  5. Step 5: Solve for x
    x = 138,421,867.04/13,440.13
  6. Step 6: Final answer
    x = 10,299.15

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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.