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Finding the Fourth Proportional to 8,685.90, 13,014.95 and 8,455.24

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Solution

The fourth proportional to 8,685.90, 13,014.95 and 8,455.24 is: 12,669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.90 : 13,014.95 = 8,455.24 : x
  2. Step 2: Convert to fraction form
    8,685.90/13,014.95 = 8,455.24/x
  3. Step 3: Cross multiply
    8,685.90x = 13,014.95 × 8,455.24
  4. Step 4: Simplify right side
    8,685.90x = 110,044,426.62
  5. Step 5: Solve for x
    x = 110,044,426.62/8,685.90
  6. Step 6: Final answer
    x = 12,669.32

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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.