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Finding the Fourth Proportional to 8,787.72, 12,127.14 and 4,808.74

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Solution

The fourth proportional to 8,787.72, 12,127.14 and 4,808.74 is: 6,636.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.72 : 12,127.14 = 4,808.74 : x
  2. Step 2: Convert to fraction form
    8,787.72/12,127.14 = 4,808.74/x
  3. Step 3: Cross multiply
    8,787.72x = 12,127.14 × 4,808.74
  4. Step 4: Simplify right side
    8,787.72x = 58,316,303.26
  5. Step 5: Solve for x
    x = 58,316,303.26/8,787.72
  6. Step 6: Final answer
    x = 6,636.12

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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.