Home / 20,574.32-30,680.81-20,387.21

Finding the Fourth Proportional to 20,574.32, 30,680.81 and 20,387.21

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Solution

The fourth proportional to 20,574.32, 30,680.81 and 20,387.21 is: 30,401.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.32 : 30,680.81 = 20,387.21 : x
  2. Step 2: Convert to fraction form
    20,574.32/30,680.81 = 20,387.21/x
  3. Step 3: Cross multiply
    20,574.32x = 30,680.81 × 20,387.21
  4. Step 4: Simplify right side
    20,574.32x = 625,495,861.10
  5. Step 5: Solve for x
    x = 625,495,861.10/20,574.32
  6. Step 6: Final answer
    x = 30,401.78

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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.