Home / 21,007.08-31,515.48-9,321.21

Finding the Fourth Proportional to 21,007.08, 31,515.48 and 9,321.21

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Solution

The fourth proportional to 21,007.08, 31,515.48 and 9,321.21 is: 13,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.08 : 31,515.48 = 9,321.21 : x
  2. Step 2: Convert to fraction form
    21,007.08/31,515.48 = 9,321.21/x
  3. Step 3: Cross multiply
    21,007.08x = 31,515.48 × 9,321.21
  4. Step 4: Simplify right side
    21,007.08x = 293,762,407.33
  5. Step 5: Solve for x
    x = 293,762,407.33/21,007.08
  6. Step 6: Final answer
    x = 13,983.97

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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.