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Finding the Fourth Proportional to 8,681.60, 13,018.50 and 3,135.08

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Solution

The fourth proportional to 8,681.60, 13,018.50 and 3,135.08 is: 4,701.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.60 : 13,018.50 = 3,135.08 : x
  2. Step 2: Convert to fraction form
    8,681.60/13,018.50 = 3,135.08/x
  3. Step 3: Cross multiply
    8,681.60x = 13,018.50 × 3,135.08
  4. Step 4: Simplify right side
    8,681.60x = 40,814,038.98
  5. Step 5: Solve for x
    x = 40,814,038.98/8,681.60
  6. Step 6: Final answer
    x = 4,701.21

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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.