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Finding the Fourth Proportional to 21,757.44, 30,017.88 and 12,802.08

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Solution

The fourth proportional to 21,757.44, 30,017.88 and 12,802.08 is: 17,662.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,757.44 : 30,017.88 = 12,802.08 : x
  2. Step 2: Convert to fraction form
    21,757.44/30,017.88 = 12,802.08/x
  3. Step 3: Cross multiply
    21,757.44x = 30,017.88 × 12,802.08
  4. Step 4: Simplify right side
    21,757.44x = 384,291,301.19
  5. Step 5: Solve for x
    x = 384,291,301.19/21,757.44
  6. Step 6: Final answer
    x = 17,662.52

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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.