Home / 21,010.33-31,515.50-12,139.17

Finding the Fourth Proportional to 21,010.33, 31,515.50 and 12,139.17

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Solution

The fourth proportional to 21,010.33, 31,515.50 and 12,139.17 is: 18,208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.33 : 31,515.50 = 12,139.17 : x
  2. Step 2: Convert to fraction form
    21,010.33/31,515.50 = 12,139.17/x
  3. Step 3: Cross multiply
    21,010.33x = 31,515.50 × 12,139.17
  4. Step 4: Simplify right side
    21,010.33x = 382,572,012.14
  5. Step 5: Solve for x
    x = 382,572,012.14/21,010.33
  6. Step 6: Final answer
    x = 18,208.76

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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.