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Finding the Fourth Proportional to 30,465.72, 45,699.50 and 8,279.57

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Solution

The fourth proportional to 30,465.72, 45,699.50 and 8,279.57 is: 12,419.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,465.72 : 45,699.50 = 8,279.57 : x
  2. Step 2: Convert to fraction form
    30,465.72/45,699.50 = 8,279.57/x
  3. Step 3: Cross multiply
    30,465.72x = 45,699.50 × 8,279.57
  4. Step 4: Simplify right side
    30,465.72x = 378,372,001.42
  5. Step 5: Solve for x
    x = 378,372,001.42/30,465.72
  6. Step 6: Final answer
    x = 12,419.60

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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.