Home / 20,272.08-27,975.20-11,319.74

Finding the Fourth Proportional to 20,272.08, 27,975.20 and 11,319.74

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Solution

The fourth proportional to 20,272.08, 27,975.20 and 11,319.74 is: 15,621.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.08 : 27,975.20 = 11,319.74 : x
  2. Step 2: Convert to fraction form
    20,272.08/27,975.20 = 11,319.74/x
  3. Step 3: Cross multiply
    20,272.08x = 27,975.20 × 11,319.74
  4. Step 4: Simplify right side
    20,272.08x = 316,671,990.45
  5. Step 5: Solve for x
    x = 316,671,990.45/20,272.08
  6. Step 6: Final answer
    x = 15,621.09

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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.