Home / 30,747.60-42,435.70-17,321.45

Finding the Fourth Proportional to 30,747.60, 42,435.70 and 17,321.45

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Solution

The fourth proportional to 30,747.60, 42,435.70 and 17,321.45 is: 23,905.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,747.60 : 42,435.70 = 17,321.45 : x
  2. Step 2: Convert to fraction form
    30,747.60/42,435.70 = 17,321.45/x
  3. Step 3: Cross multiply
    30,747.60x = 42,435.70 × 17,321.45
  4. Step 4: Simplify right side
    30,747.60x = 735,047,600.28
  5. Step 5: Solve for x
    x = 735,047,600.28/30,747.60
  6. Step 6: Final answer
    x = 23,905.85

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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.