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Finding the Fourth Proportional to 13,756.67, 18,995.84 and 8,729.81

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Solution

The fourth proportional to 13,756.67, 18,995.84 and 8,729.81 is: 12,054.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.67 : 18,995.84 = 8,729.81 : x
  2. Step 2: Convert to fraction form
    13,756.67/18,995.84 = 8,729.81/x
  3. Step 3: Cross multiply
    13,756.67x = 18,995.84 × 8,729.81
  4. Step 4: Simplify right side
    13,756.67x = 165,830,030.34
  5. Step 5: Solve for x
    x = 165,830,030.34/13,756.67
  6. Step 6: Final answer
    x = 12,054.52

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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.