Home / 21,117.66-29,142.14-11,686.29

Finding the Fourth Proportional to 21,117.66, 29,142.14 and 11,686.29

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Solution

The fourth proportional to 21,117.66, 29,142.14 and 11,686.29 is: 16,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.66 : 29,142.14 = 11,686.29 : x
  2. Step 2: Convert to fraction form
    21,117.66/29,142.14 = 11,686.29/x
  3. Step 3: Cross multiply
    21,117.66x = 29,142.14 × 11,686.29
  4. Step 4: Simplify right side
    21,117.66x = 340,563,499.26
  5. Step 5: Solve for x
    x = 340,563,499.26/21,117.66
  6. Step 6: Final answer
    x = 16,126.95

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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.