Home / 31,990.28-47,983.70-9,803.72

Finding the Fourth Proportional to 31,990.28, 47,983.70 and 9,803.72

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Solution

The fourth proportional to 31,990.28, 47,983.70 and 9,803.72 is: 14,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.28 : 47,983.70 = 9,803.72 : x
  2. Step 2: Convert to fraction form
    31,990.28/47,983.70 = 9,803.72/x
  3. Step 3: Cross multiply
    31,990.28x = 47,983.70 × 9,803.72
  4. Step 4: Simplify right side
    31,990.28x = 470,418,759.36
  5. Step 5: Solve for x
    x = 470,418,759.36/31,990.28
  6. Step 6: Final answer
    x = 14,705.05

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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.