Home / 15,731.54-21,709.18-9,021.12

Finding the Fourth Proportional to 15,731.54, 21,709.18 and 9,021.12

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Solution

The fourth proportional to 15,731.54, 21,709.18 and 9,021.12 is: 12,448.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.54 : 21,709.18 = 9,021.12 : x
  2. Step 2: Convert to fraction form
    15,731.54/21,709.18 = 9,021.12/x
  3. Step 3: Cross multiply
    15,731.54x = 21,709.18 × 9,021.12
  4. Step 4: Simplify right side
    15,731.54x = 195,841,117.88
  5. Step 5: Solve for x
    x = 195,841,117.88/15,731.54
  6. Step 6: Final answer
    x = 12,448.95

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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.