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Finding the Fourth Proportional to 10,623.63, 15,930.82 and 5,355.39

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Solution

The fourth proportional to 10,623.63, 15,930.82 and 5,355.39 is: 8,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,623.63 : 15,930.82 = 5,355.39 : x
  2. Step 2: Convert to fraction form
    10,623.63/15,930.82 = 5,355.39/x
  3. Step 3: Cross multiply
    10,623.63x = 15,930.82 × 5,355.39
  4. Step 4: Simplify right side
    10,623.63x = 85,315,754.12
  5. Step 5: Solve for x
    x = 85,315,754.12/10,623.63
  6. Step 6: Final answer
    x = 8,030.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.