Home / 21,078.60-29,088.12-11,647.20

Finding the Fourth Proportional to 21,078.60, 29,088.12 and 11,647.20

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Solution

The fourth proportional to 21,078.60, 29,088.12 and 11,647.20 is: 16,072.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.60 : 29,088.12 = 11,647.20 : x
  2. Step 2: Convert to fraction form
    21,078.60/29,088.12 = 11,647.20/x
  3. Step 3: Cross multiply
    21,078.60x = 29,088.12 × 11,647.20
  4. Step 4: Simplify right side
    21,078.60x = 338,795,151.26
  5. Step 5: Solve for x
    x = 338,795,151.26/21,078.60
  6. Step 6: Final answer
    x = 16,072.94

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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.