Home / 20,406.35-28,166.25-12,340.16

Finding the Fourth Proportional to 20,406.35, 28,166.25 and 12,340.16

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Solution

The fourth proportional to 20,406.35, 28,166.25 and 12,340.16 is: 17,032.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.35 : 28,166.25 = 12,340.16 : x
  2. Step 2: Convert to fraction form
    20,406.35/28,166.25 = 12,340.16/x
  3. Step 3: Cross multiply
    20,406.35x = 28,166.25 × 12,340.16
  4. Step 4: Simplify right side
    20,406.35x = 347,575,890.77
  5. Step 5: Solve for x
    x = 347,575,890.77/20,406.35
  6. Step 6: Final answer
    x = 17,032.74

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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.