Home / 30,728.76-42,408.88-18,800.04

Finding the Fourth Proportional to 30,728.76, 42,408.88 and 18,800.04

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Solution

The fourth proportional to 30,728.76, 42,408.88 and 18,800.04 is: 25,946.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,728.76 : 42,408.88 = 18,800.04 : x
  2. Step 2: Convert to fraction form
    30,728.76/42,408.88 = 18,800.04/x
  3. Step 3: Cross multiply
    30,728.76x = 42,408.88 × 18,800.04
  4. Step 4: Simplify right side
    30,728.76x = 797,288,640.36
  5. Step 5: Solve for x
    x = 797,288,640.36/30,728.76
  6. Step 6: Final answer
    x = 25,946.01

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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.