Home / 15,400.71-21,252.97-8,686.32

Finding the Fourth Proportional to 15,400.71, 21,252.97 and 8,686.32

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Solution

The fourth proportional to 15,400.71, 21,252.97 and 8,686.32 is: 11,987.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.71 : 21,252.97 = 8,686.32 : x
  2. Step 2: Convert to fraction form
    15,400.71/21,252.97 = 8,686.32/x
  3. Step 3: Cross multiply
    15,400.71x = 21,252.97 × 8,686.32
  4. Step 4: Simplify right side
    15,400.71x = 184,610,076.65
  5. Step 5: Solve for x
    x = 184,610,076.65/15,400.71
  6. Step 6: Final answer
    x = 11,987.11

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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.