Home / 12,280.08-18,420.16-7,351.20

Finding the Fourth Proportional to 12,280.08, 18,420.16 and 7,351.20

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Solution

The fourth proportional to 12,280.08, 18,420.16 and 7,351.20 is: 11,026.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.08 : 18,420.16 = 7,351.20 : x
  2. Step 2: Convert to fraction form
    12,280.08/18,420.16 = 7,351.20/x
  3. Step 3: Cross multiply
    12,280.08x = 18,420.16 × 7,351.20
  4. Step 4: Simplify right side
    12,280.08x = 135,410,280.19
  5. Step 5: Solve for x
    x = 135,410,280.19/12,280.08
  6. Step 6: Final answer
    x = 11,026.82

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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.