Home / 12,145.57-18,218.36-9,376.28

Finding the Fourth Proportional to 12,145.57, 18,218.36 and 9,376.28

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Solution

The fourth proportional to 12,145.57, 18,218.36 and 9,376.28 is: 14,064.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.57 : 18,218.36 = 9,376.28 : x
  2. Step 2: Convert to fraction form
    12,145.57/18,218.36 = 9,376.28/x
  3. Step 3: Cross multiply
    12,145.57x = 18,218.36 × 9,376.28
  4. Step 4: Simplify right side
    12,145.57x = 170,820,443.17
  5. Step 5: Solve for x
    x = 170,820,443.17/12,145.57
  6. Step 6: Final answer
    x = 14,064.43

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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.