Home / 14,221.68-21,347.55-7,987.02

Finding the Fourth Proportional to 14,221.68, 21,347.55 and 7,987.02

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Solution

The fourth proportional to 14,221.68, 21,347.55 and 7,987.02 is: 11,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,221.68 : 21,347.55 = 7,987.02 : x
  2. Step 2: Convert to fraction form
    14,221.68/21,347.55 = 7,987.02/x
  3. Step 3: Cross multiply
    14,221.68x = 21,347.55 × 7,987.02
  4. Step 4: Simplify right side
    14,221.68x = 170,503,308.80
  5. Step 5: Solve for x
    x = 170,503,308.80/14,221.68
  6. Step 6: Final answer
    x = 11,988.97

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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.