Home / 12,991.28-19,486.32-10,410.68

Finding the Fourth Proportional to 12,991.28, 19,486.32 and 10,410.68

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Solution

The fourth proportional to 12,991.28, 19,486.32 and 10,410.68 is: 15,615.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.28 : 19,486.32 = 10,410.68 : x
  2. Step 2: Convert to fraction form
    12,991.28/19,486.32 = 10,410.68/x
  3. Step 3: Cross multiply
    12,991.28x = 19,486.32 × 10,410.68
  4. Step 4: Simplify right side
    12,991.28x = 202,865,841.90
  5. Step 5: Solve for x
    x = 202,865,841.90/12,991.28
  6. Step 6: Final answer
    x = 15,615.54

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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.