Home / 13,995.38-20,890.68-12,334.68

Finding the Fourth Proportional to 13,995.38, 20,890.68 and 12,334.68

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Solution

The fourth proportional to 13,995.38, 20,890.68 and 12,334.68 is: 18,411.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.38 : 20,890.68 = 12,334.68 : x
  2. Step 2: Convert to fraction form
    13,995.38/20,890.68 = 12,334.68/x
  3. Step 3: Cross multiply
    13,995.38x = 20,890.68 × 12,334.68
  4. Step 4: Simplify right side
    13,995.38x = 257,679,852.78
  5. Step 5: Solve for x
    x = 257,679,852.78/13,995.38
  6. Step 6: Final answer
    x = 18,411.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.