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Finding the Fourth Proportional to 21,802.51, 30,081.90 and 13,304.07

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Solution

The fourth proportional to 21,802.51, 30,081.90 and 13,304.07 is: 18,356.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,802.51 : 30,081.90 = 13,304.07 : x
  2. Step 2: Convert to fraction form
    21,802.51/30,081.90 = 13,304.07/x
  3. Step 3: Cross multiply
    21,802.51x = 30,081.90 × 13,304.07
  4. Step 4: Simplify right side
    21,802.51x = 400,211,703.33
  5. Step 5: Solve for x
    x = 400,211,703.33/21,802.51
  6. Step 6: Final answer
    x = 18,356.22

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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.