Home / 21,002.26-31,410.43-18,678.57

Finding the Fourth Proportional to 21,002.26, 31,410.43 and 18,678.57

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Solution

The fourth proportional to 21,002.26, 31,410.43 and 18,678.57 is: 27,935.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.26 : 31,410.43 = 18,678.57 : x
  2. Step 2: Convert to fraction form
    21,002.26/31,410.43 = 18,678.57/x
  3. Step 3: Cross multiply
    21,002.26x = 31,410.43 × 18,678.57
  4. Step 4: Simplify right side
    21,002.26x = 586,701,915.49
  5. Step 5: Solve for x
    x = 586,701,915.49/21,002.26
  6. Step 6: Final answer
    x = 27,935.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.