Home / 21,126.50-29,161.91-13,066.33

Finding the Fourth Proportional to 21,126.50, 29,161.91 and 13,066.33

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Solution

The fourth proportional to 21,126.50, 29,161.91 and 13,066.33 is: 18,036.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.50 : 29,161.91 = 13,066.33 : x
  2. Step 2: Convert to fraction form
    21,126.50/29,161.91 = 13,066.33/x
  3. Step 3: Cross multiply
    21,126.50x = 29,161.91 × 13,066.33
  4. Step 4: Simplify right side
    21,126.50x = 381,039,139.49
  5. Step 5: Solve for x
    x = 381,039,139.49/21,126.50
  6. Step 6: Final answer
    x = 18,036.08

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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.