Home / 21,106.56-29,124.52-12,156.97

Finding the Fourth Proportional to 21,106.56, 29,124.52 and 12,156.97

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Solution

The fourth proportional to 21,106.56, 29,124.52 and 12,156.97 is: 16,775.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.56 : 29,124.52 = 12,156.97 : x
  2. Step 2: Convert to fraction form
    21,106.56/29,124.52 = 12,156.97/x
  3. Step 3: Cross multiply
    21,106.56x = 29,124.52 × 12,156.97
  4. Step 4: Simplify right side
    21,106.56x = 354,065,915.90
  5. Step 5: Solve for x
    x = 354,065,915.90/21,106.56
  6. Step 6: Final answer
    x = 16,775.16

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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.