Home / 21,073.57-29,078.90-13,118.36

Finding the Fourth Proportional to 21,073.57, 29,078.90 and 13,118.36

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Solution

The fourth proportional to 21,073.57, 29,078.90 and 13,118.36 is: 18,101.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.57 : 29,078.90 = 13,118.36 : x
  2. Step 2: Convert to fraction form
    21,073.57/29,078.90 = 13,118.36/x
  3. Step 3: Cross multiply
    21,073.57x = 29,078.90 × 13,118.36
  4. Step 4: Simplify right side
    21,073.57x = 381,467,316.81
  5. Step 5: Solve for x
    x = 381,467,316.81/21,073.57
  6. Step 6: Final answer
    x = 18,101.70

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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.