Home / 30,331.85-45,506.81-21,917.36

Finding the Fourth Proportional to 30,331.85, 45,506.81 and 21,917.36

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Solution

The fourth proportional to 30,331.85, 45,506.81 and 21,917.36 is: 32,882.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331.85 : 45,506.81 = 21,917.36 : x
  2. Step 2: Convert to fraction form
    30,331.85/45,506.81 = 21,917.36/x
  3. Step 3: Cross multiply
    30,331.85x = 45,506.81 × 21,917.36
  4. Step 4: Simplify right side
    30,331.85x = 997,389,141.40
  5. Step 5: Solve for x
    x = 997,389,141.40/30,331.85
  6. Step 6: Final answer
    x = 32,882.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.