Home / 30,111.20-45,148.80-18,432.80

Finding the Fourth Proportional to 30,111.20, 45,148.80 and 18,432.80

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Solution

The fourth proportional to 30,111.20, 45,148.80 and 18,432.80 is: 27,638.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,111.20 : 45,148.80 = 18,432.80 : x
  2. Step 2: Convert to fraction form
    30,111.20/45,148.80 = 18,432.80/x
  3. Step 3: Cross multiply
    30,111.20x = 45,148.80 × 18,432.80
  4. Step 4: Simplify right side
    30,111.20x = 832,218,800.64
  5. Step 5: Solve for x
    x = 832,218,800.64/30,111.20
  6. Step 6: Final answer
    x = 27,638.18

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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.