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Finding the Fourth Proportional to 8,905.04, 12,288.51 and 4,871.78

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Solution

The fourth proportional to 8,905.04, 12,288.51 and 4,871.78 is: 6,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.04 : 12,288.51 = 4,871.78 : x
  2. Step 2: Convert to fraction form
    8,905.04/12,288.51 = 4,871.78/x
  3. Step 3: Cross multiply
    8,905.04x = 12,288.51 × 4,871.78
  4. Step 4: Simplify right side
    8,905.04x = 59,866,901.89
  5. Step 5: Solve for x
    x = 59,866,901.89/8,905.04
  6. Step 6: Final answer
    x = 6,722.81

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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.