Home / 30,739.16-42,420.20-17,310.65

Finding the Fourth Proportional to 30,739.16, 42,420.20 and 17,310.65

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Solution

The fourth proportional to 30,739.16, 42,420.20 and 17,310.65 is: 23,888.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.16 : 42,420.20 = 17,310.65 : x
  2. Step 2: Convert to fraction form
    30,739.16/42,420.20 = 17,310.65/x
  3. Step 3: Cross multiply
    30,739.16x = 42,420.20 × 17,310.65
  4. Step 4: Simplify right side
    30,739.16x = 734,320,936.48
  5. Step 5: Solve for x
    x = 734,320,936.48/30,739.16
  6. Step 6: Final answer
    x = 23,888.77

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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.