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Finding the Fourth Proportional to 13,080.80, 19,588.80 and 10,488.80

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Solution

The fourth proportional to 13,080.80, 19,588.80 and 10,488.80 is: 15,707.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,080.80 : 19,588.80 = 10,488.80 : x
  2. Step 2: Convert to fraction form
    13,080.80/19,588.80 = 10,488.80/x
  3. Step 3: Cross multiply
    13,080.80x = 19,588.80 × 10,488.80
  4. Step 4: Simplify right side
    13,080.80x = 205,463,005.44
  5. Step 5: Solve for x
    x = 205,463,005.44/13,080.80
  6. Step 6: Final answer
    x = 15,707.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.