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Finding the Fourth Proportional to 13,447.77, 18,555.67 and 7,478.65

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Solution

The fourth proportional to 13,447.77, 18,555.67 and 7,478.65 is: 10,319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.77 : 18,555.67 = 7,478.65 : x
  2. Step 2: Convert to fraction form
    13,447.77/18,555.67 = 7,478.65/x
  3. Step 3: Cross multiply
    13,447.77x = 18,555.67 × 7,478.65
  4. Step 4: Simplify right side
    13,447.77x = 138,771,361.45
  5. Step 5: Solve for x
    x = 138,771,361.45/13,447.77
  6. Step 6: Final answer
    x = 10,319.28

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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.