Home / 21,117.66-29,141.96-11,686.23

Finding the Fourth Proportional to 21,117.66, 29,141.96 and 11,686.23

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Solution

The fourth proportional to 21,117.66, 29,141.96 and 11,686.23 is: 16,126.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.66 : 29,141.96 = 11,686.23 : x
  2. Step 2: Convert to fraction form
    21,117.66/29,141.96 = 11,686.23/x
  3. Step 3: Cross multiply
    21,117.66x = 29,141.96 × 11,686.23
  4. Step 4: Simplify right side
    21,117.66x = 340,559,588.78
  5. Step 5: Solve for x
    x = 340,559,588.78/21,117.66
  6. Step 6: Final answer
    x = 16,126.77

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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.