Home / 30,923.10-42,704.19-21,387.42

Finding the Fourth Proportional to 30,923.10, 42,704.19 and 21,387.42

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Solution

The fourth proportional to 30,923.10, 42,704.19 and 21,387.42 is: 29,535.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,923.10 : 42,704.19 = 21,387.42 : x
  2. Step 2: Convert to fraction form
    30,923.10/42,704.19 = 21,387.42/x
  3. Step 3: Cross multiply
    30,923.10x = 42,704.19 × 21,387.42
  4. Step 4: Simplify right side
    30,923.10x = 913,332,447.29
  5. Step 5: Solve for x
    x = 913,332,447.29/30,923.10
  6. Step 6: Final answer
    x = 29,535.60

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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.