Home / 21,315.19-31,943.85-11,317.41

Finding the Fourth Proportional to 21,315.19, 31,943.85 and 11,317.41

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Solution

The fourth proportional to 21,315.19, 31,943.85 and 11,317.41 is: 16,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.19 : 31,943.85 = 11,317.41 : x
  2. Step 2: Convert to fraction form
    21,315.19/31,943.85 = 11,317.41/x
  3. Step 3: Cross multiply
    21,315.19x = 31,943.85 × 11,317.41
  4. Step 4: Simplify right side
    21,315.19x = 361,521,647.43
  5. Step 5: Solve for x
    x = 361,521,647.43/21,315.19
  6. Step 6: Final answer
    x = 16,960.75

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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.