Home / 12,143.45-16,758.38-7,108.14

Finding the Fourth Proportional to 12,143.45, 16,758.38 and 7,108.14

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Solution

The fourth proportional to 12,143.45, 16,758.38 and 7,108.14 is: 9,809.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.45 : 16,758.38 = 7,108.14 : x
  2. Step 2: Convert to fraction form
    12,143.45/16,758.38 = 7,108.14/x
  3. Step 3: Cross multiply
    12,143.45x = 16,758.38 × 7,108.14
  4. Step 4: Simplify right side
    12,143.45x = 119,120,875.67
  5. Step 5: Solve for x
    x = 119,120,875.67/12,143.45
  6. Step 6: Final answer
    x = 9,809.48

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.