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Finding the Fourth Proportional to 4,991.61, 6,885.81 and 3,810.63

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Solution

The fourth proportional to 4,991.61, 6,885.81 and 3,810.63 is: 5,256.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.61 : 6,885.81 = 3,810.63 : x
  2. Step 2: Convert to fraction form
    4,991.61/6,885.81 = 3,810.63/x
  3. Step 3: Cross multiply
    4,991.61x = 6,885.81 × 3,810.63
  4. Step 4: Simplify right side
    4,991.61x = 26,239,274.16
  5. Step 5: Solve for x
    x = 26,239,274.16/4,991.61
  6. Step 6: Final answer
    x = 5,256.68

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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.