Home / 20,432.48-30,670.20-18,107.40

Finding the Fourth Proportional to 20,432.48, 30,670.20 and 18,107.40

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Solution

The fourth proportional to 20,432.48, 30,670.20 and 18,107.40 is: 27,180.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.48 : 30,670.20 = 18,107.40 : x
  2. Step 2: Convert to fraction form
    20,432.48/30,670.20 = 18,107.40/x
  3. Step 3: Cross multiply
    20,432.48x = 30,670.20 × 18,107.40
  4. Step 4: Simplify right side
    20,432.48x = 555,357,579.48
  5. Step 5: Solve for x
    x = 555,357,579.48/20,432.48
  6. Step 6: Final answer
    x = 27,180.14

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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.