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Finding the Fourth Proportional to 29,018.40, 40,031.16 and 18,942.18

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Solution

The fourth proportional to 29,018.40, 40,031.16 and 18,942.18 is: 26,130.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,018.40 : 40,031.16 = 18,942.18 : x
  2. Step 2: Convert to fraction form
    29,018.40/40,031.16 = 18,942.18/x
  3. Step 3: Cross multiply
    29,018.40x = 40,031.16 × 18,942.18
  4. Step 4: Simplify right side
    29,018.40x = 758,277,438.33
  5. Step 5: Solve for x
    x = 758,277,438.33/29,018.40
  6. Step 6: Final answer
    x = 26,130.92

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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.