Home / 30,743.38-42,426.49-18,643.81

Finding the Fourth Proportional to 30,743.38, 42,426.49 and 18,643.81

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Solution

The fourth proportional to 30,743.38, 42,426.49 and 18,643.81 is: 25,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,743.38 : 42,426.49 = 18,643.81 : x
  2. Step 2: Convert to fraction form
    30,743.38/42,426.49 = 18,643.81/x
  3. Step 3: Cross multiply
    30,743.38x = 42,426.49 × 18,643.81
  4. Step 4: Simplify right side
    30,743.38x = 790,991,418.53
  5. Step 5: Solve for x
    x = 790,991,418.53/30,743.38
  6. Step 6: Final answer
    x = 25,728.84

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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.