Home / 20,379.41-28,113.15-13,585.13

Finding the Fourth Proportional to 20,379.41, 28,113.15 and 13,585.13

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Solution

The fourth proportional to 20,379.41, 28,113.15 and 13,585.13 is: 18,740.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.41 : 28,113.15 = 13,585.13 : x
  2. Step 2: Convert to fraction form
    20,379.41/28,113.15 = 13,585.13/x
  3. Step 3: Cross multiply
    20,379.41x = 28,113.15 × 13,585.13
  4. Step 4: Simplify right side
    20,379.41x = 381,920,813.26
  5. Step 5: Solve for x
    x = 381,920,813.26/20,379.41
  6. Step 6: Final answer
    x = 18,740.52

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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.