Home / 12,158.39-18,237.58-9,389.10

Finding the Fourth Proportional to 12,158.39, 18,237.58 and 9,389.10

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Solution

The fourth proportional to 12,158.39, 18,237.58 and 9,389.10 is: 14,083.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158.39 : 18,237.58 = 9,389.10 : x
  2. Step 2: Convert to fraction form
    12,158.39/18,237.58 = 9,389.10/x
  3. Step 3: Cross multiply
    12,158.39x = 18,237.58 × 9,389.10
  4. Step 4: Simplify right side
    12,158.39x = 171,234,491.72
  5. Step 5: Solve for x
    x = 171,234,491.72/12,158.39
  6. Step 6: Final answer
    x = 14,083.65

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Half scale
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Double scale
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Similar ratio
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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.