Home / 21,116.91-29,141.60-11,686.35

Finding the Fourth Proportional to 21,116.91, 29,141.60 and 11,686.35

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Solution

The fourth proportional to 21,116.91, 29,141.60 and 11,686.35 is: 16,127.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.91 : 29,141.60 = 11,686.35 : x
  2. Step 2: Convert to fraction form
    21,116.91/29,141.60 = 11,686.35/x
  3. Step 3: Cross multiply
    21,116.91x = 29,141.60 × 11,686.35
  4. Step 4: Simplify right side
    21,116.91x = 340,558,878.73
  5. Step 5: Solve for x
    x = 340,558,878.73/21,116.91
  6. Step 6: Final answer
    x = 16,127.31

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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.