Home / 13,320.30-19,980.45-3,458.75

Finding the Fourth Proportional to 13,320.30, 19,980.45 and 3,458.75

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Solution

The fourth proportional to 13,320.30, 19,980.45 and 3,458.75 is: 5,188.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.30 : 19,980.45 = 3,458.75 : x
  2. Step 2: Convert to fraction form
    13,320.30/19,980.45 = 3,458.75/x
  3. Step 3: Cross multiply
    13,320.30x = 19,980.45 × 3,458.75
  4. Step 4: Simplify right side
    13,320.30x = 69,107,381.44
  5. Step 5: Solve for x
    x = 69,107,381.44/13,320.30
  6. Step 6: Final answer
    x = 5,188.13

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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.