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Finding the Fourth Proportional to 21,937.76, 30,246.64 and 18,309.01

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Solution

The fourth proportional to 21,937.76, 30,246.64 and 18,309.01 is: 25,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.76 : 30,246.64 = 18,309.01 : x
  2. Step 2: Convert to fraction form
    21,937.76/30,246.64 = 18,309.01/x
  3. Step 3: Cross multiply
    21,937.76x = 30,246.64 × 18,309.01
  4. Step 4: Simplify right side
    21,937.76x = 553,786,034.23
  5. Step 5: Solve for x
    x = 553,786,034.23/21,937.76
  6. Step 6: Final answer
    x = 25,243.51

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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.