Home / 21,279.51-29,382.35-16,555.59

Finding the Fourth Proportional to 21,279.51, 29,382.35 and 16,555.59

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Solution

The fourth proportional to 21,279.51, 29,382.35 and 16,555.59 is: 22,859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.51 : 29,382.35 = 16,555.59 : x
  2. Step 2: Convert to fraction form
    21,279.51/29,382.35 = 16,555.59/x
  3. Step 3: Cross multiply
    21,279.51x = 29,382.35 × 16,555.59
  4. Step 4: Simplify right side
    21,279.51x = 486,442,057.06
  5. Step 5: Solve for x
    x = 486,442,057.06/21,279.51
  6. Step 6: Final answer
    x = 22,859.65

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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.