Home / 22,211.51-30,650.99-13,142.75

Finding the Fourth Proportional to 22,211.51, 30,650.99 and 13,142.75

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Solution

The fourth proportional to 22,211.51, 30,650.99 and 13,142.75 is: 18,136.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,211.51 : 30,650.99 = 13,142.75 : x
  2. Step 2: Convert to fraction form
    22,211.51/30,650.99 = 13,142.75/x
  3. Step 3: Cross multiply
    22,211.51x = 30,650.99 × 13,142.75
  4. Step 4: Simplify right side
    22,211.51x = 402,838,079.85
  5. Step 5: Solve for x
    x = 402,838,079.85/22,211.51
  6. Step 6: Final answer
    x = 18,136.46

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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.