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Finding the Fourth Proportional to 42,755.70, 64,140.57 and 13,173.54

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Solution

The fourth proportional to 42,755.70, 64,140.57 and 13,173.54 is: 19,762.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,755.70 : 64,140.57 = 13,173.54 : x
  2. Step 2: Convert to fraction form
    42,755.70/64,140.57 = 13,173.54/x
  3. Step 3: Cross multiply
    42,755.70x = 64,140.57 × 13,173.54
  4. Step 4: Simplify right side
    42,755.70x = 844,958,364.52
  5. Step 5: Solve for x
    x = 844,958,364.52/42,755.70
  6. Step 6: Final answer
    x = 19,762.47

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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.