Home / 30,309.34-45,470.22-12,779.20

Finding the Fourth Proportional to 30,309.34, 45,470.22 and 12,779.20

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Solution

The fourth proportional to 30,309.34, 45,470.22 and 12,779.20 is: 19,171.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,309.34 : 45,470.22 = 12,779.20 : x
  2. Step 2: Convert to fraction form
    30,309.34/45,470.22 = 12,779.20/x
  3. Step 3: Cross multiply
    30,309.34x = 45,470.22 × 12,779.20
  4. Step 4: Simplify right side
    30,309.34x = 581,073,035.42
  5. Step 5: Solve for x
    x = 581,073,035.42/30,309.34
  6. Step 6: Final answer
    x = 19,171.42

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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.