Home / 21,078.57-29,088.54-11,647.13

Finding the Fourth Proportional to 21,078.57, 29,088.54 and 11,647.13

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Solution

The fourth proportional to 21,078.57, 29,088.54 and 11,647.13 is: 16,073.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.57 : 29,088.54 = 11,647.13 : x
  2. Step 2: Convert to fraction form
    21,078.57/29,088.54 = 11,647.13/x
  3. Step 3: Cross multiply
    21,078.57x = 29,088.54 × 11,647.13
  4. Step 4: Simplify right side
    21,078.57x = 338,798,079.61
  5. Step 5: Solve for x
    x = 338,798,079.61/21,078.57
  6. Step 6: Final answer
    x = 16,073.11

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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.