Home / 20,993.28-31,500.84-9,303.78

Finding the Fourth Proportional to 20,993.28, 31,500.84 and 9,303.78

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Solution

The fourth proportional to 20,993.28, 31,500.84 and 9,303.78 is: 13,960.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.28 : 31,500.84 = 9,303.78 : x
  2. Step 2: Convert to fraction form
    20,993.28/31,500.84 = 9,303.78/x
  3. Step 3: Cross multiply
    20,993.28x = 31,500.84 × 9,303.78
  4. Step 4: Simplify right side
    20,993.28x = 293,076,885.18
  5. Step 5: Solve for x
    x = 293,076,885.18/20,993.28
  6. Step 6: Final answer
    x = 13,960.51

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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.