Home / 20,281.28-27,987.86-11,328.91

Finding the Fourth Proportional to 20,281.28, 27,987.86 and 11,328.91

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Solution

The fourth proportional to 20,281.28, 27,987.86 and 11,328.91 is: 15,633.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.28 : 27,987.86 = 11,328.91 : x
  2. Step 2: Convert to fraction form
    20,281.28/27,987.86 = 11,328.91/x
  3. Step 3: Cross multiply
    20,281.28x = 27,987.86 × 11,328.91
  4. Step 4: Simplify right side
    20,281.28x = 317,071,947.03
  5. Step 5: Solve for x
    x = 317,071,947.03/20,281.28
  6. Step 6: Final answer
    x = 15,633.72

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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.