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Finding the Fourth Proportional to 30,378.60, 45,503.10 and 26,490.60

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Solution

The fourth proportional to 30,378.60, 45,503.10 and 26,490.60 is: 39,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,378.60 : 45,503.10 = 26,490.60 : x
  2. Step 2: Convert to fraction form
    30,378.60/45,503.10 = 26,490.60/x
  3. Step 3: Cross multiply
    30,378.60x = 45,503.10 × 26,490.60
  4. Step 4: Simplify right side
    30,378.60x = 1,205,404,420.86
  5. Step 5: Solve for x
    x = 1,205,404,420.86/30,378.60
  6. Step 6: Final answer
    x = 39,679.39

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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.