Home / 13,612.80-20,386.26-6,931.76

Finding the Fourth Proportional to 13,612.80, 20,386.26 and 6,931.76

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Solution

The fourth proportional to 13,612.80, 20,386.26 and 6,931.76 is: 10,380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.80 : 20,386.26 = 6,931.76 : x
  2. Step 2: Convert to fraction form
    13,612.80/20,386.26 = 6,931.76/x
  3. Step 3: Cross multiply
    13,612.80x = 20,386.26 × 6,931.76
  4. Step 4: Simplify right side
    13,612.80x = 141,312,661.62
  5. Step 5: Solve for x
    x = 141,312,661.62/13,612.80
  6. Step 6: Final answer
    x = 10,380.87

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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.