Home / 13,434.09-20,143.32-9,878.34

Finding the Fourth Proportional to 13,434.09, 20,143.32 and 9,878.34

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Solution

The fourth proportional to 13,434.09, 20,143.32 and 9,878.34 is: 14,811.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,434.09 : 20,143.32 = 9,878.34 : x
  2. Step 2: Convert to fraction form
    13,434.09/20,143.32 = 9,878.34/x
  3. Step 3: Cross multiply
    13,434.09x = 20,143.32 × 9,878.34
  4. Step 4: Simplify right side
    13,434.09x = 198,982,462.97
  5. Step 5: Solve for x
    x = 198,982,462.97/13,434.09
  6. Step 6: Final answer
    x = 14,811.76

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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.