Home / 21,915.58-32,873.10-20,853.04

Finding the Fourth Proportional to 21,915.58, 32,873.10 and 20,853.04

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Solution

The fourth proportional to 21,915.58, 32,873.10 and 20,853.04 is: 31,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.58 : 32,873.10 = 20,853.04 : x
  2. Step 2: Convert to fraction form
    21,915.58/32,873.10 = 20,853.04/x
  3. Step 3: Cross multiply
    21,915.58x = 32,873.10 × 20,853.04
  4. Step 4: Simplify right side
    21,915.58x = 685,504,069.22
  5. Step 5: Solve for x
    x = 685,504,069.22/21,915.58
  6. Step 6: Final answer
    x = 31,279.30

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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.