Home / 12,821.10-19,246.05-9,912.30

Finding the Fourth Proportional to 12,821.10, 19,246.05 and 9,912.30

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Solution

The fourth proportional to 12,821.10, 19,246.05 and 9,912.30 is: 14,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.10 : 19,246.05 = 9,912.30 : x
  2. Step 2: Convert to fraction form
    12,821.10/19,246.05 = 9,912.30/x
  3. Step 3: Cross multiply
    12,821.10x = 19,246.05 × 9,912.30
  4. Step 4: Simplify right side
    12,821.10x = 190,772,621.42
  5. Step 5: Solve for x
    x = 190,772,621.42/12,821.10
  6. Step 6: Final answer
    x = 14,879.58

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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.