Home / 21,210.13-29,271.33-11,778.69

Finding the Fourth Proportional to 21,210.13, 29,271.33 and 11,778.69

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Solution

The fourth proportional to 21,210.13, 29,271.33 and 11,778.69 is: 16,255.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.13 : 29,271.33 = 11,778.69 : x
  2. Step 2: Convert to fraction form
    21,210.13/29,271.33 = 11,778.69/x
  3. Step 3: Cross multiply
    21,210.13x = 29,271.33 × 11,778.69
  4. Step 4: Simplify right side
    21,210.13x = 344,777,921.96
  5. Step 5: Solve for x
    x = 344,777,921.96/21,210.13
  6. Step 6: Final answer
    x = 16,255.34

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Double scale
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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.