Home / 12,057.09-16,639.67-7,278.20

Finding the Fourth Proportional to 12,057.09, 16,639.67 and 7,278.20

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Solution

The fourth proportional to 12,057.09, 16,639.67 and 7,278.20 is: 10,044.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,057.09 : 16,639.67 = 7,278.20 : x
  2. Step 2: Convert to fraction form
    12,057.09/16,639.67 = 7,278.20/x
  3. Step 3: Cross multiply
    12,057.09x = 16,639.67 × 7,278.20
  4. Step 4: Simplify right side
    12,057.09x = 121,106,846.19
  5. Step 5: Solve for x
    x = 121,106,846.19/12,057.09
  6. Step 6: Final answer
    x = 10,044.45

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.