Home / 21,069.19-29,081.07-13,106.89

Finding the Fourth Proportional to 21,069.19, 29,081.07 and 13,106.89

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Solution

The fourth proportional to 21,069.19, 29,081.07 and 13,106.89 is: 18,090.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.19 : 29,081.07 = 13,106.89 : x
  2. Step 2: Convert to fraction form
    21,069.19/29,081.07 = 13,106.89/x
  3. Step 3: Cross multiply
    21,069.19x = 29,081.07 × 13,106.89
  4. Step 4: Simplify right side
    21,069.19x = 381,162,385.57
  5. Step 5: Solve for x
    x = 381,162,385.57/21,069.19
  6. Step 6: Final answer
    x = 18,090.98

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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.