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Finding the Fourth Proportional to 13,490.16, 18,625.08 and 8,712.24

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Solution

The fourth proportional to 13,490.16, 18,625.08 and 8,712.24 is: 12,028.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.16 : 18,625.08 = 8,712.24 : x
  2. Step 2: Convert to fraction form
    13,490.16/18,625.08 = 8,712.24/x
  3. Step 3: Cross multiply
    13,490.16x = 18,625.08 × 8,712.24
  4. Step 4: Simplify right side
    13,490.16x = 162,266,166.98
  5. Step 5: Solve for x
    x = 162,266,166.98/13,490.16
  6. Step 6: Final answer
    x = 12,028.48

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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.