Home / 20,123.02-30,169.14-7,639.30

Finding the Fourth Proportional to 20,123.02, 30,169.14 and 7,639.30

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Solution

The fourth proportional to 20,123.02, 30,169.14 and 7,639.30 is: 11,453.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.02 : 30,169.14 = 7,639.30 : x
  2. Step 2: Convert to fraction form
    20,123.02/30,169.14 = 7,639.30/x
  3. Step 3: Cross multiply
    20,123.02x = 30,169.14 × 7,639.30
  4. Step 4: Simplify right side
    20,123.02x = 230,471,111.20
  5. Step 5: Solve for x
    x = 230,471,111.20/20,123.02
  6. Step 6: Final answer
    x = 11,453.11

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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.