Home / 21,130.61-29,161.15-11,699.17

Finding the Fourth Proportional to 21,130.61, 29,161.15 and 11,699.17

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Solution

The fourth proportional to 21,130.61, 29,161.15 and 11,699.17 is: 16,145.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.61 : 29,161.15 = 11,699.17 : x
  2. Step 2: Convert to fraction form
    21,130.61/29,161.15 = 11,699.17/x
  3. Step 3: Cross multiply
    21,130.61x = 29,161.15 × 11,699.17
  4. Step 4: Simplify right side
    21,130.61x = 341,161,251.25
  5. Step 5: Solve for x
    x = 341,161,251.25/21,130.61
  6. Step 6: Final answer
    x = 16,145.36

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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.