Home / 15,116.90-20,858.10-9,147.38

Finding the Fourth Proportional to 15,116.90, 20,858.10 and 9,147.38

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Solution

The fourth proportional to 15,116.90, 20,858.10 and 9,147.38 is: 12,621.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.90 : 20,858.10 = 9,147.38 : x
  2. Step 2: Convert to fraction form
    15,116.90/20,858.10 = 9,147.38/x
  3. Step 3: Cross multiply
    15,116.90x = 20,858.10 × 9,147.38
  4. Step 4: Simplify right side
    15,116.90x = 190,796,966.78
  5. Step 5: Solve for x
    x = 190,796,966.78/15,116.90
  6. Step 6: Final answer
    x = 12,621.43

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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.