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Finding the Fourth Proportional to 22,386.70, 30,891.21 and 12,953.50

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Solution

The fourth proportional to 22,386.70, 30,891.21 and 12,953.50 is: 17,874.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,386.70 : 30,891.21 = 12,953.50 : x
  2. Step 2: Convert to fraction form
    22,386.70/30,891.21 = 12,953.50/x
  3. Step 3: Cross multiply
    22,386.70x = 30,891.21 × 12,953.50
  4. Step 4: Simplify right side
    22,386.70x = 400,149,288.74
  5. Step 5: Solve for x
    x = 400,149,288.74/22,386.70
  6. Step 6: Final answer
    x = 17,874.42

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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.