Home / 20,407.25-28,162.31-12,339.77

Finding the Fourth Proportional to 20,407.25, 28,162.31 and 12,339.77

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Solution

The fourth proportional to 20,407.25, 28,162.31 and 12,339.77 is: 17,029.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.25 : 28,162.31 = 12,339.77 : x
  2. Step 2: Convert to fraction form
    20,407.25/28,162.31 = 12,339.77/x
  3. Step 3: Cross multiply
    20,407.25x = 28,162.31 × 12,339.77
  4. Step 4: Simplify right side
    20,407.25x = 347,516,225.56
  5. Step 5: Solve for x
    x = 347,516,225.56/20,407.25
  6. Step 6: Final answer
    x = 17,029.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.