Home / 21,078.40-29,088.27-11,518.29

Finding the Fourth Proportional to 21,078.40, 29,088.27 and 11,518.29

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Solution

The fourth proportional to 21,078.40, 29,088.27 and 11,518.29 is: 15,895.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.40 : 29,088.27 = 11,518.29 : x
  2. Step 2: Convert to fraction form
    21,078.40/29,088.27 = 11,518.29/x
  3. Step 3: Cross multiply
    21,078.40x = 29,088.27 × 11,518.29
  4. Step 4: Simplify right side
    21,078.40x = 335,046,926.43
  5. Step 5: Solve for x
    x = 335,046,926.43/21,078.40
  6. Step 6: Final answer
    x = 15,895.27

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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.