Home / 15,555.08-21,452.78-13,144.26

Finding the Fourth Proportional to 15,555.08, 21,452.78 and 13,144.26

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Solution

The fourth proportional to 15,555.08, 21,452.78 and 13,144.26 is: 18,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.08 : 21,452.78 = 13,144.26 : x
  2. Step 2: Convert to fraction form
    15,555.08/21,452.78 = 13,144.26/x
  3. Step 3: Cross multiply
    15,555.08x = 21,452.78 × 13,144.26
  4. Step 4: Simplify right side
    15,555.08x = 281,980,918.04
  5. Step 5: Solve for x
    x = 281,980,918.04/15,555.08
  6. Step 6: Final answer
    x = 18,127.90

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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.