Home / 21,108.74-29,130.23-11,677.91

Finding the Fourth Proportional to 21,108.74, 29,130.23 and 11,677.91

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Solution

The fourth proportional to 21,108.74, 29,130.23 and 11,677.91 is: 16,115.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.74 : 29,130.23 = 11,677.91 : x
  2. Step 2: Convert to fraction form
    21,108.74/29,130.23 = 11,677.91/x
  3. Step 3: Cross multiply
    21,108.74x = 29,130.23 × 11,677.91
  4. Step 4: Simplify right side
    21,108.74x = 340,180,087.76
  5. Step 5: Solve for x
    x = 340,180,087.76/21,108.74
  6. Step 6: Final answer
    x = 16,115.61

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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.