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Finding the Fourth Proportional to 18,396.64, 25,387.52 and 10,438.88

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Solution

The fourth proportional to 18,396.64, 25,387.52 and 10,438.88 is: 14,405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,396.64 : 25,387.52 = 10,438.88 : x
  2. Step 2: Convert to fraction form
    18,396.64/25,387.52 = 10,438.88/x
  3. Step 3: Cross multiply
    18,396.64x = 25,387.52 × 10,438.88
  4. Step 4: Simplify right side
    18,396.64x = 265,017,274.78
  5. Step 5: Solve for x
    x = 265,017,274.78/18,396.64
  6. Step 6: Final answer
    x = 14,405.74

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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.