Home / 20,880.32-28,853.01-15,205.19

Finding the Fourth Proportional to 20,880.32, 28,853.01 and 15,205.19

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Solution

The fourth proportional to 20,880.32, 28,853.01 and 15,205.19 is: 21,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.32 : 28,853.01 = 15,205.19 : x
  2. Step 2: Convert to fraction form
    20,880.32/28,853.01 = 15,205.19/x
  3. Step 3: Cross multiply
    20,880.32x = 28,853.01 × 15,205.19
  4. Step 4: Simplify right side
    20,880.32x = 438,715,354.86
  5. Step 5: Solve for x
    x = 438,715,354.86/20,880.32
  6. Step 6: Final answer
    x = 21,010.95

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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.