Home / 30,121.34-45,132.73-18,239.11

Finding the Fourth Proportional to 30,121.34, 45,132.73 and 18,239.11

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Solution

The fourth proportional to 30,121.34, 45,132.73 and 18,239.11 is: 27,328.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.34 : 45,132.73 = 18,239.11 : x
  2. Step 2: Convert to fraction form
    30,121.34/45,132.73 = 18,239.11/x
  3. Step 3: Cross multiply
    30,121.34x = 45,132.73 × 18,239.11
  4. Step 4: Simplify right side
    30,121.34x = 823,180,827.07
  5. Step 5: Solve for x
    x = 823,180,827.07/30,121.34
  6. Step 6: Final answer
    x = 27,328.82

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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.