Home / 30,155.10-41,614.47-18,216.78

Finding the Fourth Proportional to 30,155.10, 41,614.47 and 18,216.78

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Solution

The fourth proportional to 30,155.10, 41,614.47 and 18,216.78 is: 25,139.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,155.10 : 41,614.47 = 18,216.78 : x
  2. Step 2: Convert to fraction form
    30,155.10/41,614.47 = 18,216.78/x
  3. Step 3: Cross multiply
    30,155.10x = 41,614.47 × 18,216.78
  4. Step 4: Simplify right side
    30,155.10x = 758,081,644.81
  5. Step 5: Solve for x
    x = 758,081,644.81/30,155.10
  6. Step 6: Final answer
    x = 25,139.42

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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.