Home / 30,639.50-42,286.15-17,210.78

Finding the Fourth Proportional to 30,639.50, 42,286.15 and 17,210.78

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Solution

The fourth proportional to 30,639.50, 42,286.15 and 17,210.78 is: 23,752.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.50 : 42,286.15 = 17,210.78 : x
  2. Step 2: Convert to fraction form
    30,639.50/42,286.15 = 17,210.78/x
  3. Step 3: Cross multiply
    30,639.50x = 42,286.15 × 17,210.78
  4. Step 4: Simplify right side
    30,639.50x = 727,777,624.70
  5. Step 5: Solve for x
    x = 727,777,624.70/30,639.50
  6. Step 6: Final answer
    x = 23,752.92

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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.