Home / 20,272.53-27,972.90-11,319.60

Finding the Fourth Proportional to 20,272.53, 27,972.90 and 11,319.60

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Solution

The fourth proportional to 20,272.53, 27,972.90 and 11,319.60 is: 15,619.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.53 : 27,972.90 = 11,319.60 : x
  2. Step 2: Convert to fraction form
    20,272.53/27,972.90 = 11,319.60/x
  3. Step 3: Cross multiply
    20,272.53x = 27,972.90 × 11,319.60
  4. Step 4: Simplify right side
    20,272.53x = 316,642,038.84
  5. Step 5: Solve for x
    x = 316,642,038.84/20,272.53
  6. Step 6: Final answer
    x = 15,619.27

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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.