Home / 21,307.23-29,404.11-11,876.40

Finding the Fourth Proportional to 21,307.23, 29,404.11 and 11,876.40

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Solution

The fourth proportional to 21,307.23, 29,404.11 and 11,876.40 is: 16,389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.23 : 29,404.11 = 11,876.40 : x
  2. Step 2: Convert to fraction form
    21,307.23/29,404.11 = 11,876.40/x
  3. Step 3: Cross multiply
    21,307.23x = 29,404.11 × 11,876.40
  4. Step 4: Simplify right side
    21,307.23x = 349,214,972.00
  5. Step 5: Solve for x
    x = 349,214,972.00/21,307.23
  6. Step 6: Final answer
    x = 16,389.51

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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.