Home / 30,727.92-42,417.60-20,662.20

Finding the Fourth Proportional to 30,727.92, 42,417.60 and 20,662.20

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Solution

The fourth proportional to 30,727.92, 42,417.60 and 20,662.20 is: 28,522.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,727.92 : 42,417.60 = 20,662.20 : x
  2. Step 2: Convert to fraction form
    30,727.92/42,417.60 = 20,662.20/x
  3. Step 3: Cross multiply
    30,727.92x = 42,417.60 × 20,662.20
  4. Step 4: Simplify right side
    30,727.92x = 876,440,934.72
  5. Step 5: Solve for x
    x = 876,440,934.72/30,727.92
  6. Step 6: Final answer
    x = 28,522.62

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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.