Home / 18,578.72-25,638.78-10,402.40

Finding the Fourth Proportional to 18,578.72, 25,638.78 and 10,402.40

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Solution

The fourth proportional to 18,578.72, 25,638.78 and 10,402.40 is: 14,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.72 : 25,638.78 = 10,402.40 : x
  2. Step 2: Convert to fraction form
    18,578.72/25,638.78 = 10,402.40/x
  3. Step 3: Cross multiply
    18,578.72x = 25,638.78 × 10,402.40
  4. Step 4: Simplify right side
    18,578.72x = 266,704,845.07
  5. Step 5: Solve for x
    x = 266,704,845.07/18,578.72
  6. Step 6: Final answer
    x = 14,355.39

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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.