Home / 21,279.51-29,357.74-12,323.75

Finding the Fourth Proportional to 21,279.51, 29,357.74 and 12,323.75

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Solution

The fourth proportional to 21,279.51, 29,357.74 and 12,323.75 is: 17,002.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.51 : 29,357.74 = 12,323.75 : x
  2. Step 2: Convert to fraction form
    21,279.51/29,357.74 = 12,323.75/x
  3. Step 3: Cross multiply
    21,279.51x = 29,357.74 × 12,323.75
  4. Step 4: Simplify right side
    21,279.51x = 361,797,316.94
  5. Step 5: Solve for x
    x = 361,797,316.94/21,279.51
  6. Step 6: Final answer
    x = 17,002.15

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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.