Home / 10,355.45-15,518.59-7,760.21

Finding the Fourth Proportional to 10,355.45, 15,518.59 and 7,760.21

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Solution

The fourth proportional to 10,355.45, 15,518.59 and 7,760.21 is: 11,629.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,355.45 : 15,518.59 = 7,760.21 : x
  2. Step 2: Convert to fraction form
    10,355.45/15,518.59 = 7,760.21/x
  3. Step 3: Cross multiply
    10,355.45x = 15,518.59 × 7,760.21
  4. Step 4: Simplify right side
    10,355.45x = 120,427,420.31
  5. Step 5: Solve for x
    x = 120,427,420.31/10,355.45
  6. Step 6: Final answer
    x = 11,629.38

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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.