Home / 30,360.12-45,555.67-20,478.68

Finding the Fourth Proportional to 30,360.12, 45,555.67 and 20,478.68

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Solution

The fourth proportional to 30,360.12, 45,555.67 and 20,478.68 is: 30,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,360.12 : 45,555.67 = 20,478.68 : x
  2. Step 2: Convert to fraction form
    30,360.12/45,555.67 = 20,478.68/x
  3. Step 3: Cross multiply
    30,360.12x = 45,555.67 × 20,478.68
  4. Step 4: Simplify right side
    30,360.12x = 932,919,885.72
  5. Step 5: Solve for x
    x = 932,919,885.72/30,360.12
  6. Step 6: Final answer
    x = 30,728.47

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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.