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Finding the Fourth Proportional to 21,995.91, 30,347.22 and 12,434.87

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Solution

The fourth proportional to 21,995.91, 30,347.22 and 12,434.87 is: 17,156.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.91 : 30,347.22 = 12,434.87 : x
  2. Step 2: Convert to fraction form
    21,995.91/30,347.22 = 12,434.87/x
  3. Step 3: Cross multiply
    21,995.91x = 30,347.22 × 12,434.87
  4. Step 4: Simplify right side
    21,995.91x = 377,363,673.39
  5. Step 5: Solve for x
    x = 377,363,673.39/21,995.91
  6. Step 6: Final answer
    x = 17,156.08

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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.