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Finding the Fourth Proportional to 18,368.40, 25,353 and 10,415.40

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Solution

The fourth proportional to 18,368.40, 25,353 and 10,415.40 is: 14,375.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.40 : 25,353 = 10,415.40 : x
  2. Step 2: Convert to fraction form
    18,368.40/25,353 = 10,415.40/x
  3. Step 3: Cross multiply
    18,368.40x = 25,353 × 10,415.40
  4. Step 4: Simplify right side
    18,368.40x = 264,061,636.20
  5. Step 5: Solve for x
    x = 264,061,636.20/18,368.40
  6. Step 6: Final answer
    x = 14,375.86

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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.