Home / 30,947.91-42,708.16-16,800.75

Finding the Fourth Proportional to 30,947.91, 42,708.16 and 16,800.75

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Solution

The fourth proportional to 30,947.91, 42,708.16 and 16,800.75 is: 23,185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,947.91 : 42,708.16 = 16,800.75 : x
  2. Step 2: Convert to fraction form
    30,947.91/42,708.16 = 16,800.75/x
  3. Step 3: Cross multiply
    30,947.91x = 42,708.16 × 16,800.75
  4. Step 4: Simplify right side
    30,947.91x = 717,529,140.12
  5. Step 5: Solve for x
    x = 717,529,140.12/30,947.91
  6. Step 6: Final answer
    x = 23,185.06

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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.