Home / 20,379.16-28,125.66-13,326.04

Finding the Fourth Proportional to 20,379.16, 28,125.66 and 13,326.04

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Solution

The fourth proportional to 20,379.16, 28,125.66 and 13,326.04 is: 18,391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.16 : 28,125.66 = 13,326.04 : x
  2. Step 2: Convert to fraction form
    20,379.16/28,125.66 = 13,326.04/x
  3. Step 3: Cross multiply
    20,379.16x = 28,125.66 × 13,326.04
  4. Step 4: Simplify right side
    20,379.16x = 374,803,670.19
  5. Step 5: Solve for x
    x = 374,803,670.19/20,379.16
  6. Step 6: Final answer
    x = 18,391.52

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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.