Home / 30,785.76-42,484.20-16,638.56

Finding the Fourth Proportional to 30,785.76, 42,484.20 and 16,638.56

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Solution

The fourth proportional to 30,785.76, 42,484.20 and 16,638.56 is: 22,961.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,785.76 : 42,484.20 = 16,638.56 : x
  2. Step 2: Convert to fraction form
    30,785.76/42,484.20 = 16,638.56/x
  3. Step 3: Cross multiply
    30,785.76x = 42,484.20 × 16,638.56
  4. Step 4: Simplify right side
    30,785.76x = 706,875,910.75
  5. Step 5: Solve for x
    x = 706,875,910.75/30,785.76
  6. Step 6: Final answer
    x = 22,961.13

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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.