Home / 21,187.72-29,221.50-16,100.08

Finding the Fourth Proportional to 21,187.72, 29,221.50 and 16,100.08

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Solution

The fourth proportional to 21,187.72, 29,221.50 and 16,100.08 is: 22,204.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.72 : 29,221.50 = 16,100.08 : x
  2. Step 2: Convert to fraction form
    21,187.72/29,221.50 = 16,100.08/x
  3. Step 3: Cross multiply
    21,187.72x = 29,221.50 × 16,100.08
  4. Step 4: Simplify right side
    21,187.72x = 470,468,487.72
  5. Step 5: Solve for x
    x = 470,468,487.72/21,187.72
  6. Step 6: Final answer
    x = 22,204.77

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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.