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Finding the Fourth Proportional to 8,865.79, 12,234.30 and 4,886.21

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Solution

The fourth proportional to 8,865.79, 12,234.30 and 4,886.21 is: 6,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.79 : 12,234.30 = 4,886.21 : x
  2. Step 2: Convert to fraction form
    8,865.79/12,234.30 = 4,886.21/x
  3. Step 3: Cross multiply
    8,865.79x = 12,234.30 × 4,886.21
  4. Step 4: Simplify right side
    8,865.79x = 59,779,359.00
  5. Step 5: Solve for x
    x = 59,779,359.00/8,865.79
  6. Step 6: Final answer
    x = 6,742.70

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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.