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Finding the Fourth Proportional to 11,502.77, 15,879.16 and 8,671.28

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Solution

The fourth proportional to 11,502.77, 15,879.16 and 8,671.28 is: 11,970.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,502.77 : 15,879.16 = 8,671.28 : x
  2. Step 2: Convert to fraction form
    11,502.77/15,879.16 = 8,671.28/x
  3. Step 3: Cross multiply
    11,502.77x = 15,879.16 × 8,671.28
  4. Step 4: Simplify right side
    11,502.77x = 137,692,688.63
  5. Step 5: Solve for x
    x = 137,692,688.63/11,502.77
  6. Step 6: Final answer
    x = 11,970.40

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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.