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Finding the Fourth Proportional to 13,788.80, 19,028.48 and 7,501.12

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Solution

The fourth proportional to 13,788.80, 19,028.48 and 7,501.12 is: 10,351.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.80 : 19,028.48 = 7,501.12 : x
  2. Step 2: Convert to fraction form
    13,788.80/19,028.48 = 7,501.12/x
  3. Step 3: Cross multiply
    13,788.80x = 19,028.48 × 7,501.12
  4. Step 4: Simplify right side
    13,788.80x = 142,734,911.90
  5. Step 5: Solve for x
    x = 142,734,911.90/13,788.80
  6. Step 6: Final answer
    x = 10,351.51

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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.