Home / 13,740.16-18,961.68-8,154.40

Finding the Fourth Proportional to 13,740.16, 18,961.68 and 8,154.40

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Solution

The fourth proportional to 13,740.16, 18,961.68 and 8,154.40 is: 11,253.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.16 : 18,961.68 = 8,154.40 : x
  2. Step 2: Convert to fraction form
    13,740.16/18,961.68 = 8,154.40/x
  3. Step 3: Cross multiply
    13,740.16x = 18,961.68 × 8,154.40
  4. Step 4: Simplify right side
    13,740.16x = 154,621,123.39
  5. Step 5: Solve for x
    x = 154,621,123.39/13,740.16
  6. Step 6: Final answer
    x = 11,253.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.