Home / 39,885.75-55,042.02-21,980.43

Finding the Fourth Proportional to 39,885.75, 55,042.02 and 21,980.43

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Solution

The fourth proportional to 39,885.75, 55,042.02 and 21,980.43 is: 30,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.75 : 55,042.02 = 21,980.43 : x
  2. Step 2: Convert to fraction form
    39,885.75/55,042.02 = 21,980.43/x
  3. Step 3: Cross multiply
    39,885.75x = 55,042.02 × 21,980.43
  4. Step 4: Simplify right side
    39,885.75x = 1,209,847,267.67
  5. Step 5: Solve for x
    x = 1,209,847,267.67/39,885.75
  6. Step 6: Final answer
    x = 30,332.82

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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.