Home / 31,979.12-47,970.99-9,789.62

Finding the Fourth Proportional to 31,979.12, 47,970.99 and 9,789.62

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Solution

The fourth proportional to 31,979.12, 47,970.99 and 9,789.62 is: 14,685.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,979.12 : 47,970.99 = 9,789.62 : x
  2. Step 2: Convert to fraction form
    31,979.12/47,970.99 = 9,789.62/x
  3. Step 3: Cross multiply
    31,979.12x = 47,970.99 × 9,789.62
  4. Step 4: Simplify right side
    31,979.12x = 469,617,563.88
  5. Step 5: Solve for x
    x = 469,617,563.88/31,979.12
  6. Step 6: Final answer
    x = 14,685.13

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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.