Home / 30,659.67-42,314.25-18,720.48

Finding the Fourth Proportional to 30,659.67, 42,314.25 and 18,720.48

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Solution

The fourth proportional to 30,659.67, 42,314.25 and 18,720.48 is: 25,836.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,659.67 : 42,314.25 = 18,720.48 : x
  2. Step 2: Convert to fraction form
    30,659.67/42,314.25 = 18,720.48/x
  3. Step 3: Cross multiply
    30,659.67x = 42,314.25 × 18,720.48
  4. Step 4: Simplify right side
    30,659.67x = 792,143,070.84
  5. Step 5: Solve for x
    x = 792,143,070.84/30,659.67
  6. Step 6: Final answer
    x = 25,836.65

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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.