Home / 30,121.80-45,182.70-9,345.30

Finding the Fourth Proportional to 30,121.80, 45,182.70 and 9,345.30

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Solution

The fourth proportional to 30,121.80, 45,182.70 and 9,345.30 is: 14,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.80 : 45,182.70 = 9,345.30 : x
  2. Step 2: Convert to fraction form
    30,121.80/45,182.70 = 9,345.30/x
  3. Step 3: Cross multiply
    30,121.80x = 45,182.70 × 9,345.30
  4. Step 4: Simplify right side
    30,121.80x = 422,245,886.31
  5. Step 5: Solve for x
    x = 422,245,886.31/30,121.80
  6. Step 6: Final answer
    x = 14,017.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.