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Finding the Fourth Proportional to 21,307.77, 29,404.76 and 11,876.13

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Solution

The fourth proportional to 21,307.77, 29,404.76 and 11,876.13 is: 16,389.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.77 : 29,404.76 = 11,876.13 : x
  2. Step 2: Convert to fraction form
    21,307.77/29,404.76 = 11,876.13/x
  3. Step 3: Cross multiply
    21,307.77x = 29,404.76 × 11,876.13
  4. Step 4: Simplify right side
    21,307.77x = 349,214,693.00
  5. Step 5: Solve for x
    x = 349,214,693.00/21,307.77
  6. Step 6: Final answer
    x = 16,389.08

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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.