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Finding the Fourth Proportional to 11,787.66, 16,264.80 and 7,009.20

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Solution

The fourth proportional to 11,787.66, 16,264.80 and 7,009.20 is: 9,671.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,787.66 : 16,264.80 = 7,009.20 : x
  2. Step 2: Convert to fraction form
    11,787.66/16,264.80 = 7,009.20/x
  3. Step 3: Cross multiply
    11,787.66x = 16,264.80 × 7,009.20
  4. Step 4: Simplify right side
    11,787.66x = 114,003,236.16
  5. Step 5: Solve for x
    x = 114,003,236.16/11,787.66
  6. Step 6: Final answer
    x = 9,671.41

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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.