Home / 21,223.50-29,291.13-12,840.06

Finding the Fourth Proportional to 21,223.50, 29,291.13 and 12,840.06

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Solution

The fourth proportional to 21,223.50, 29,291.13 and 12,840.06 is: 17,720.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.50 : 29,291.13 = 12,840.06 : x
  2. Step 2: Convert to fraction form
    21,223.50/29,291.13 = 12,840.06/x
  3. Step 3: Cross multiply
    21,223.50x = 29,291.13 × 12,840.06
  4. Step 4: Simplify right side
    21,223.50x = 376,099,866.67
  5. Step 5: Solve for x
    x = 376,099,866.67/21,223.50
  6. Step 6: Final answer
    x = 17,720.92

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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.