Home / 20,178.10-30,282.81-13,981.53

Finding the Fourth Proportional to 20,178.10, 30,282.81 and 13,981.53

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Solution

The fourth proportional to 20,178.10, 30,282.81 and 13,981.53 is: 20,983.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.10 : 30,282.81 = 13,981.53 : x
  2. Step 2: Convert to fraction form
    20,178.10/30,282.81 = 13,981.53/x
  3. Step 3: Cross multiply
    20,178.10x = 30,282.81 × 13,981.53
  4. Step 4: Simplify right side
    20,178.10x = 423,400,016.50
  5. Step 5: Solve for x
    x = 423,400,016.50/20,178.10
  6. Step 6: Final answer
    x = 20,983.15

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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.