Home / 21,620.91-29,838.23-12,190.08

Finding the Fourth Proportional to 21,620.91, 29,838.23 and 12,190.08

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Solution

The fourth proportional to 21,620.91, 29,838.23 and 12,190.08 is: 16,823.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.91 : 29,838.23 = 12,190.08 : x
  2. Step 2: Convert to fraction form
    21,620.91/29,838.23 = 12,190.08/x
  3. Step 3: Cross multiply
    21,620.91x = 29,838.23 × 12,190.08
  4. Step 4: Simplify right side
    21,620.91x = 363,730,349.81
  5. Step 5: Solve for x
    x = 363,730,349.81/21,620.91
  6. Step 6: Final answer
    x = 16,823.08

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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.