Home / 20,281.95-27,987.69-11,206.92

Finding the Fourth Proportional to 20,281.95, 27,987.69 and 11,206.92

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Solution

The fourth proportional to 20,281.95, 27,987.69 and 11,206.92 is: 15,464.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.95 : 27,987.69 = 11,206.92 : x
  2. Step 2: Convert to fraction form
    20,281.95/27,987.69 = 11,206.92/x
  3. Step 3: Cross multiply
    20,281.95x = 27,987.69 × 11,206.92
  4. Step 4: Simplify right side
    20,281.95x = 313,655,802.81
  5. Step 5: Solve for x
    x = 313,655,802.81/20,281.95
  6. Step 6: Final answer
    x = 15,464.78

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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.