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Finding the Fourth Proportional to 8,637, 11,921.22 and 4,913.16

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Solution

The fourth proportional to 8,637, 11,921.22 and 4,913.16 is: 6,781.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637 : 11,921.22 = 4,913.16 : x
  2. Step 2: Convert to fraction form
    8,637/11,921.22 = 4,913.16/x
  3. Step 3: Cross multiply
    8,637x = 11,921.22 × 4,913.16
  4. Step 4: Simplify right side
    8,637x = 58,570,861.26
  5. Step 5: Solve for x
    x = 58,570,861.26/8,637
  6. Step 6: Final answer
    x = 6,781.39

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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.