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Finding the Fourth Proportional to 18,402.55, 25,396.55 and 10,853.30

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Solution

The fourth proportional to 18,402.55, 25,396.55 and 10,853.30 is: 14,978.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,402.55 : 25,396.55 = 10,853.30 : x
  2. Step 2: Convert to fraction form
    18,402.55/25,396.55 = 10,853.30/x
  3. Step 3: Cross multiply
    18,402.55x = 25,396.55 × 10,853.30
  4. Step 4: Simplify right side
    18,402.55x = 275,636,376.12
  5. Step 5: Solve for x
    x = 275,636,376.12/18,402.55
  6. Step 6: Final answer
    x = 14,978.16

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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.