Home / 21,368.66-29,486.10-11,939

Finding the Fourth Proportional to 21,368.66, 29,486.10 and 11,939

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Solution

The fourth proportional to 21,368.66, 29,486.10 and 11,939 is: 16,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,368.66 : 29,486.10 = 11,939 : x
  2. Step 2: Convert to fraction form
    21,368.66/29,486.10 = 11,939/x
  3. Step 3: Cross multiply
    21,368.66x = 29,486.10 × 11,939
  4. Step 4: Simplify right side
    21,368.66x = 352,034,547.90
  5. Step 5: Solve for x
    x = 352,034,547.90/21,368.66
  6. Step 6: Final answer
    x = 16,474.34

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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.