Home / 20,280.79-30,422.99-7,133.28

Finding the Fourth Proportional to 20,280.79, 30,422.99 and 7,133.28

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Solution

The fourth proportional to 20,280.79, 30,422.99 and 7,133.28 is: 10,700.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.79 : 30,422.99 = 7,133.28 : x
  2. Step 2: Convert to fraction form
    20,280.79/30,422.99 = 7,133.28/x
  3. Step 3: Cross multiply
    20,280.79x = 30,422.99 × 7,133.28
  4. Step 4: Simplify right side
    20,280.79x = 217,015,706.11
  5. Step 5: Solve for x
    x = 217,015,706.11/20,280.79
  6. Step 6: Final answer
    x = 10,700.55

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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.