Home / 21,013.48-31,521.30-5,431.24

Finding the Fourth Proportional to 21,013.48, 31,521.30 and 5,431.24

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Solution

The fourth proportional to 21,013.48, 31,521.30 and 5,431.24 is: 8,147.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.48 : 31,521.30 = 5,431.24 : x
  2. Step 2: Convert to fraction form
    21,013.48/31,521.30 = 5,431.24/x
  3. Step 3: Cross multiply
    21,013.48x = 31,521.30 × 5,431.24
  4. Step 4: Simplify right side
    21,013.48x = 171,199,745.41
  5. Step 5: Solve for x
    x = 171,199,745.41/21,013.48
  6. Step 6: Final answer
    x = 8,147.14

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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.