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Finding the Fourth Proportional to 8,706.40, 12,014.80 and 4,727.47

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Solution

The fourth proportional to 8,706.40, 12,014.80 and 4,727.47 is: 6,523.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.40 : 12,014.80 = 4,727.47 : x
  2. Step 2: Convert to fraction form
    8,706.40/12,014.80 = 4,727.47/x
  3. Step 3: Cross multiply
    8,706.40x = 12,014.80 × 4,727.47
  4. Step 4: Simplify right side
    8,706.40x = 56,799,606.56
  5. Step 5: Solve for x
    x = 56,799,606.56/8,706.40
  6. Step 6: Final answer
    x = 6,523.89

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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.