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Finding the Fourth Proportional to 8,590.02, 12,856.95 and 5,305.74

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Solution

The fourth proportional to 8,590.02, 12,856.95 and 5,305.74 is: 7,941.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.02 : 12,856.95 = 5,305.74 : x
  2. Step 2: Convert to fraction form
    8,590.02/12,856.95 = 5,305.74/x
  3. Step 3: Cross multiply
    8,590.02x = 12,856.95 × 5,305.74
  4. Step 4: Simplify right side
    8,590.02x = 68,215,633.89
  5. Step 5: Solve for x
    x = 68,215,633.89/8,590.02
  6. Step 6: Final answer
    x = 7,941.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.