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Finding the Fourth Proportional to 13,085.58, 18,054.94 and 8,303.78

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Solution

The fourth proportional to 13,085.58, 18,054.94 and 8,303.78 is: 11,457.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.58 : 18,054.94 = 8,303.78 : x
  2. Step 2: Convert to fraction form
    13,085.58/18,054.94 = 8,303.78/x
  3. Step 3: Cross multiply
    13,085.58x = 18,054.94 × 8,303.78
  4. Step 4: Simplify right side
    13,085.58x = 149,924,249.67
  5. Step 5: Solve for x
    x = 149,924,249.67/13,085.58
  6. Step 6: Final answer
    x = 11,457.21

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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.