Home / 20,359.78-30,529.35-7,210.30

Finding the Fourth Proportional to 20,359.78, 30,529.35 and 7,210.30

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Solution

The fourth proportional to 20,359.78, 30,529.35 and 7,210.30 is: 10,811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.78 : 30,529.35 = 7,210.30 : x
  2. Step 2: Convert to fraction form
    20,359.78/30,529.35 = 7,210.30/x
  3. Step 3: Cross multiply
    20,359.78x = 30,529.35 × 7,210.30
  4. Step 4: Simplify right side
    20,359.78x = 220,125,772.31
  5. Step 5: Solve for x
    x = 220,125,772.31/20,359.78
  6. Step 6: Final answer
    x = 10,811.80

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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.