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Finding the Fourth Proportional to 18,638.96, 25,721.62 and 10,574.16

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Solution

The fourth proportional to 18,638.96, 25,721.62 and 10,574.16 is: 14,592.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.96 : 25,721.62 = 10,574.16 : x
  2. Step 2: Convert to fraction form
    18,638.96/25,721.62 = 10,574.16/x
  3. Step 3: Cross multiply
    18,638.96x = 25,721.62 × 10,574.16
  4. Step 4: Simplify right side
    18,638.96x = 271,984,525.34
  5. Step 5: Solve for x
    x = 271,984,525.34/18,638.96
  6. Step 6: Final answer
    x = 14,592.26

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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.