Home / 30,321.80-41,839.20-18,985.76

Finding the Fourth Proportional to 30,321.80, 41,839.20 and 18,985.76

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Solution

The fourth proportional to 30,321.80, 41,839.20 and 18,985.76 is: 26,197.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,321.80 : 41,839.20 = 18,985.76 : x
  2. Step 2: Convert to fraction form
    30,321.80/41,839.20 = 18,985.76/x
  3. Step 3: Cross multiply
    30,321.80x = 41,839.20 × 18,985.76
  4. Step 4: Simplify right side
    30,321.80x = 794,349,009.79
  5. Step 5: Solve for x
    x = 794,349,009.79/30,321.80
  6. Step 6: Final answer
    x = 26,197.29

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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.