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Finding the Fourth Proportional to 8,470.61, 12,705.74 and 4,523.21

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Solution

The fourth proportional to 8,470.61, 12,705.74 and 4,523.21 is: 6,784.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.61 : 12,705.74 = 4,523.21 : x
  2. Step 2: Convert to fraction form
    8,470.61/12,705.74 = 4,523.21/x
  3. Step 3: Cross multiply
    8,470.61x = 12,705.74 × 4,523.21
  4. Step 4: Simplify right side
    8,470.61x = 57,470,707.61
  5. Step 5: Solve for x
    x = 57,470,707.61/8,470.61
  6. Step 6: Final answer
    x = 6,784.72

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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.