Home / 30,288.30-45,432.45-20,957.10

Finding the Fourth Proportional to 30,288.30, 45,432.45 and 20,957.10

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Solution

The fourth proportional to 30,288.30, 45,432.45 and 20,957.10 is: 31,435.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,288.30 : 45,432.45 = 20,957.10 : x
  2. Step 2: Convert to fraction form
    30,288.30/45,432.45 = 20,957.10/x
  3. Step 3: Cross multiply
    30,288.30x = 45,432.45 × 20,957.10
  4. Step 4: Simplify right side
    30,288.30x = 952,132,397.90
  5. Step 5: Solve for x
    x = 952,132,397.90/30,288.30
  6. Step 6: Final answer
    x = 31,435.65

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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.