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Finding the Fourth Proportional to 22,195.63, 30,631.40 and 12,763.99

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Solution

The fourth proportional to 22,195.63, 30,631.40 and 12,763.99 is: 17,615.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,195.63 : 30,631.40 = 12,763.99 : x
  2. Step 2: Convert to fraction form
    22,195.63/30,631.40 = 12,763.99/x
  3. Step 3: Cross multiply
    22,195.63x = 30,631.40 × 12,763.99
  4. Step 4: Simplify right side
    22,195.63x = 390,978,883.29
  5. Step 5: Solve for x
    x = 390,978,883.29/22,195.63
  6. Step 6: Final answer
    x = 17,615.13

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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.