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Finding the Fourth Proportional to 18,210.80, 25,135.08 and 10,658

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Solution

The fourth proportional to 18,210.80, 25,135.08 and 10,658 is: 14,710.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210.80 : 25,135.08 = 10,658 : x
  2. Step 2: Convert to fraction form
    18,210.80/25,135.08 = 10,658/x
  3. Step 3: Cross multiply
    18,210.80x = 25,135.08 × 10,658
  4. Step 4: Simplify right side
    18,210.80x = 267,889,682.64
  5. Step 5: Solve for x
    x = 267,889,682.64/18,210.80
  6. Step 6: Final answer
    x = 14,710.48

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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.