Home / 21,078.70-29,088.35-11,647.06

Finding the Fourth Proportional to 21,078.70, 29,088.35 and 11,647.06

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Solution

The fourth proportional to 21,078.70, 29,088.35 and 11,647.06 is: 16,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.70 : 29,088.35 = 11,647.06 : x
  2. Step 2: Convert to fraction form
    21,078.70/29,088.35 = 11,647.06/x
  3. Step 3: Cross multiply
    21,078.70x = 29,088.35 × 11,647.06
  4. Step 4: Simplify right side
    21,078.70x = 338,793,670.47
  5. Step 5: Solve for x
    x = 338,793,670.47/21,078.70
  6. Step 6: Final answer
    x = 16,072.80

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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.