Home / 21,549.30-29,736.63-12,117.66

Finding the Fourth Proportional to 21,549.30, 29,736.63 and 12,117.66

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Solution

The fourth proportional to 21,549.30, 29,736.63 and 12,117.66 is: 16,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,549.30 : 29,736.63 = 12,117.66 : x
  2. Step 2: Convert to fraction form
    21,549.30/29,736.63 = 12,117.66/x
  3. Step 3: Cross multiply
    21,549.30x = 29,736.63 × 12,117.66
  4. Step 4: Simplify right side
    21,549.30x = 360,338,371.89
  5. Step 5: Solve for x
    x = 360,338,371.89/21,549.30
  6. Step 6: Final answer
    x = 16,721.58

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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.