Home / 30,986.14-42,764.52-18,410.90

Finding the Fourth Proportional to 30,986.14, 42,764.52 and 18,410.90

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Solution

The fourth proportional to 30,986.14, 42,764.52 and 18,410.90 is: 25,409.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.14 : 42,764.52 = 18,410.90 : x
  2. Step 2: Convert to fraction form
    30,986.14/42,764.52 = 18,410.90/x
  3. Step 3: Cross multiply
    30,986.14x = 42,764.52 × 18,410.90
  4. Step 4: Simplify right side
    30,986.14x = 787,333,301.27
  5. Step 5: Solve for x
    x = 787,333,301.27/30,986.14
  6. Step 6: Final answer
    x = 25,409.21

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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.