Home / 15,513.39-21,408.89-8,798.76

Finding the Fourth Proportional to 15,513.39, 21,408.89 and 8,798.76

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Solution

The fourth proportional to 15,513.39, 21,408.89 and 8,798.76 is: 12,142.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.39 : 21,408.89 = 8,798.76 : x
  2. Step 2: Convert to fraction form
    15,513.39/21,408.89 = 8,798.76/x
  3. Step 3: Cross multiply
    15,513.39x = 21,408.89 × 8,798.76
  4. Step 4: Simplify right side
    15,513.39x = 188,371,640.98
  5. Step 5: Solve for x
    x = 188,371,640.98/15,513.39
  6. Step 6: Final answer
    x = 12,142.52

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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.