Home / 21,688.52-29,930.72-12,257.68

Finding the Fourth Proportional to 21,688.52, 29,930.72 and 12,257.68

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Solution

The fourth proportional to 21,688.52, 29,930.72 and 12,257.68 is: 16,915.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.52 : 29,930.72 = 12,257.68 : x
  2. Step 2: Convert to fraction form
    21,688.52/29,930.72 = 12,257.68/x
  3. Step 3: Cross multiply
    21,688.52x = 29,930.72 × 12,257.68
  4. Step 4: Simplify right side
    21,688.52x = 366,881,187.93
  5. Step 5: Solve for x
    x = 366,881,187.93/21,688.52
  6. Step 6: Final answer
    x = 16,915.92

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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.