Home / 15,987.72-22,078.26-15,115.08

Finding the Fourth Proportional to 15,987.72, 22,078.26 and 15,115.08

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Solution

The fourth proportional to 15,987.72, 22,078.26 and 15,115.08 is: 20,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987.72 : 22,078.26 = 15,115.08 : x
  2. Step 2: Convert to fraction form
    15,987.72/22,078.26 = 15,115.08/x
  3. Step 3: Cross multiply
    15,987.72x = 22,078.26 × 15,115.08
  4. Step 4: Simplify right side
    15,987.72x = 333,714,666.16
  5. Step 5: Solve for x
    x = 333,714,666.16/15,987.72
  6. Step 6: Final answer
    x = 20,873.19

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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.