Home / 21,114.70-29,141.86-12,160.56

Finding the Fourth Proportional to 21,114.70, 29,141.86 and 12,160.56

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Solution

The fourth proportional to 21,114.70, 29,141.86 and 12,160.56 is: 16,783.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.70 : 29,141.86 = 12,160.56 : x
  2. Step 2: Convert to fraction form
    21,114.70/29,141.86 = 12,160.56/x
  3. Step 3: Cross multiply
    21,114.70x = 29,141.86 × 12,160.56
  4. Step 4: Simplify right side
    21,114.70x = 354,381,337.04
  5. Step 5: Solve for x
    x = 354,381,337.04/21,114.70
  6. Step 6: Final answer
    x = 16,783.63

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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.