Home / 21,165.40-29,208.63-11,605.11

Finding the Fourth Proportional to 21,165.40, 29,208.63 and 11,605.11

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Solution

The fourth proportional to 21,165.40, 29,208.63 and 11,605.11 is: 16,015.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.40 : 29,208.63 = 11,605.11 : x
  2. Step 2: Convert to fraction form
    21,165.40/29,208.63 = 11,605.11/x
  3. Step 3: Cross multiply
    21,165.40x = 29,208.63 × 11,605.11
  4. Step 4: Simplify right side
    21,165.40x = 338,969,298.09
  5. Step 5: Solve for x
    x = 338,969,298.09/21,165.40
  6. Step 6: Final answer
    x = 16,015.25

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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.