Home / 15,760.99-21,742.53-10,091.20

Finding the Fourth Proportional to 15,760.99, 21,742.53 and 10,091.20

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Solution

The fourth proportional to 15,760.99, 21,742.53 and 10,091.20 is: 13,920.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.99 : 21,742.53 = 10,091.20 : x
  2. Step 2: Convert to fraction form
    15,760.99/21,742.53 = 10,091.20/x
  3. Step 3: Cross multiply
    15,760.99x = 21,742.53 × 10,091.20
  4. Step 4: Simplify right side
    15,760.99x = 219,408,218.74
  5. Step 5: Solve for x
    x = 219,408,218.74/15,760.99
  6. Step 6: Final answer
    x = 13,920.97

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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.