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Finding the Fourth Proportional to 13,486.88, 18,610.16 and 7,518.24

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Solution

The fourth proportional to 13,486.88, 18,610.16 and 7,518.24 is: 10,374.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.88 : 18,610.16 = 7,518.24 : x
  2. Step 2: Convert to fraction form
    13,486.88/18,610.16 = 7,518.24/x
  3. Step 3: Cross multiply
    13,486.88x = 18,610.16 × 7,518.24
  4. Step 4: Simplify right side
    13,486.88x = 139,915,649.32
  5. Step 5: Solve for x
    x = 139,915,649.32/13,486.88
  6. Step 6: Final answer
    x = 10,374.20

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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.