Home / 10,438.95-15,660.15-5,174.21

Finding the Fourth Proportional to 10,438.95, 15,660.15 and 5,174.21

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Solution

The fourth proportional to 10,438.95, 15,660.15 and 5,174.21 is: 7,762.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,438.95 : 15,660.15 = 5,174.21 : x
  2. Step 2: Convert to fraction form
    10,438.95/15,660.15 = 5,174.21/x
  3. Step 3: Cross multiply
    10,438.95x = 15,660.15 × 5,174.21
  4. Step 4: Simplify right side
    10,438.95x = 81,028,826.43
  5. Step 5: Solve for x
    x = 81,028,826.43/10,438.95
  6. Step 6: Final answer
    x = 7,762.16

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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.