Home / 28,406.90-42,610.16-8,685.38

Finding the Fourth Proportional to 28,406.90, 42,610.16 and 8,685.38

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Solution

The fourth proportional to 28,406.90, 42,610.16 and 8,685.38 is: 13,028.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.90 : 42,610.16 = 8,685.38 : x
  2. Step 2: Convert to fraction form
    28,406.90/42,610.16 = 8,685.38/x
  3. Step 3: Cross multiply
    28,406.90x = 42,610.16 × 8,685.38
  4. Step 4: Simplify right side
    28,406.90x = 370,085,431.46
  5. Step 5: Solve for x
    x = 370,085,431.46/28,406.90
  6. Step 6: Final answer
    x = 13,028.01

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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.