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Finding the Fourth Proportional to 13,568, 18,720.60 and 7,899.26

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Solution

The fourth proportional to 13,568, 18,720.60 and 7,899.26 is: 10,899.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,568 : 18,720.60 = 7,899.26 : x
  2. Step 2: Convert to fraction form
    13,568/18,720.60 = 7,899.26/x
  3. Step 3: Cross multiply
    13,568x = 18,720.60 × 7,899.26
  4. Step 4: Simplify right side
    13,568x = 147,878,886.76
  5. Step 5: Solve for x
    x = 147,878,886.76/13,568
  6. Step 6: Final answer
    x = 10,899.09

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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.