Home / 21,307.78-29,405.74-11,876.41

Finding the Fourth Proportional to 21,307.78, 29,405.74 and 11,876.41

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Solution

The fourth proportional to 21,307.78, 29,405.74 and 11,876.41 is: 16,390.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.78 : 29,405.74 = 11,876.41 : x
  2. Step 2: Convert to fraction form
    21,307.78/29,405.74 = 11,876.41/x
  3. Step 3: Cross multiply
    21,307.78x = 29,405.74 × 11,876.41
  4. Step 4: Simplify right side
    21,307.78x = 349,234,624.59
  5. Step 5: Solve for x
    x = 349,234,624.59/21,307.78
  6. Step 6: Final answer
    x = 16,390.01

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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.