Home / 20,804.20-31,206.30-9,140.20

Finding the Fourth Proportional to 20,804.20, 31,206.30 and 9,140.20

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Solution

The fourth proportional to 20,804.20, 31,206.30 and 9,140.20 is: 13,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.20 : 31,206.30 = 9,140.20 : x
  2. Step 2: Convert to fraction form
    20,804.20/31,206.30 = 9,140.20/x
  3. Step 3: Cross multiply
    20,804.20x = 31,206.30 × 9,140.20
  4. Step 4: Simplify right side
    20,804.20x = 285,231,823.26
  5. Step 5: Solve for x
    x = 285,231,823.26/20,804.20
  6. Step 6: Final answer
    x = 13,710.30

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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.