Home / 12,521.20-18,779.40-3,756.40

Finding the Fourth Proportional to 12,521.20, 18,779.40 and 3,756.40

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Solution

The fourth proportional to 12,521.20, 18,779.40 and 3,756.40 is: 5,633.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.20 : 18,779.40 = 3,756.40 : x
  2. Step 2: Convert to fraction form
    12,521.20/18,779.40 = 3,756.40/x
  3. Step 3: Cross multiply
    12,521.20x = 18,779.40 × 3,756.40
  4. Step 4: Simplify right side
    12,521.20x = 70,542,938.16
  5. Step 5: Solve for x
    x = 70,542,938.16/12,521.20
  6. Step 6: Final answer
    x = 5,633.88

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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.