Home / 20,915.86-31,373.60-9,229.08

Finding the Fourth Proportional to 20,915.86, 31,373.60 and 9,229.08

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Solution

The fourth proportional to 20,915.86, 31,373.60 and 9,229.08 is: 13,843.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.86 : 31,373.60 = 9,229.08 : x
  2. Step 2: Convert to fraction form
    20,915.86/31,373.60 = 9,229.08/x
  3. Step 3: Cross multiply
    20,915.86x = 31,373.60 × 9,229.08
  4. Step 4: Simplify right side
    20,915.86x = 289,549,464.29
  5. Step 5: Solve for x
    x = 289,549,464.29/20,915.86
  6. Step 6: Final answer
    x = 13,843.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.