Home / 12,945.57-19,437.80-7,405.17

Finding the Fourth Proportional to 12,945.57, 19,437.80 and 7,405.17

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Solution

The fourth proportional to 12,945.57, 19,437.80 and 7,405.17 is: 11,118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.57 : 19,437.80 = 7,405.17 : x
  2. Step 2: Convert to fraction form
    12,945.57/19,437.80 = 7,405.17/x
  3. Step 3: Cross multiply
    12,945.57x = 19,437.80 × 7,405.17
  4. Step 4: Simplify right side
    12,945.57x = 143,940,176.40
  5. Step 5: Solve for x
    x = 143,940,176.40/12,945.57
  6. Step 6: Final answer
    x = 11,118.88

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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.