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Finding the Fourth Proportional to 28,991.71, 40,031.18 and 22,266.69

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Solution

The fourth proportional to 28,991.71, 40,031.18 and 22,266.69 is: 30,745.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.71 : 40,031.18 = 22,266.69 : x
  2. Step 2: Convert to fraction form
    28,991.71/40,031.18 = 22,266.69/x
  3. Step 3: Cross multiply
    28,991.71x = 40,031.18 × 22,266.69
  4. Step 4: Simplify right side
    28,991.71x = 891,361,875.39
  5. Step 5: Solve for x
    x = 891,361,875.39/28,991.71
  6. Step 6: Final answer
    x = 30,745.41

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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.