Home / 21,002.44-31,506.54-9,315.40

Finding the Fourth Proportional to 21,002.44, 31,506.54 and 9,315.40

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Solution

The fourth proportional to 21,002.44, 31,506.54 and 9,315.40 is: 13,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.44 : 31,506.54 = 9,315.40 : x
  2. Step 2: Convert to fraction form
    21,002.44/31,506.54 = 9,315.40/x
  3. Step 3: Cross multiply
    21,002.44x = 31,506.54 × 9,315.40
  4. Step 4: Simplify right side
    21,002.44x = 293,496,022.72
  5. Step 5: Solve for x
    x = 293,496,022.72/21,002.44
  6. Step 6: Final answer
    x = 13,974.38

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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.