Home / 12,345.70-18,521.43-3,580.78

Finding the Fourth Proportional to 12,345.70, 18,521.43 and 3,580.78

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Solution

The fourth proportional to 12,345.70, 18,521.43 and 3,580.78 is: 5,372.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.70 : 18,521.43 = 3,580.78 : x
  2. Step 2: Convert to fraction form
    12,345.70/18,521.43 = 3,580.78/x
  3. Step 3: Cross multiply
    12,345.70x = 18,521.43 × 3,580.78
  4. Step 4: Simplify right side
    12,345.70x = 66,321,166.12
  5. Step 5: Solve for x
    x = 66,321,166.12/12,345.70
  6. Step 6: Final answer
    x = 5,372.01

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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.