Home / 15,399.91-21,252.95-8,686.16

Finding the Fourth Proportional to 15,399.91, 21,252.95 and 8,686.16

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Solution

The fourth proportional to 15,399.91, 21,252.95 and 8,686.16 is: 11,987.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.91 : 21,252.95 = 8,686.16 : x
  2. Step 2: Convert to fraction form
    15,399.91/21,252.95 = 8,686.16/x
  3. Step 3: Cross multiply
    15,399.91x = 21,252.95 × 8,686.16
  4. Step 4: Simplify right side
    15,399.91x = 184,606,524.17
  5. Step 5: Solve for x
    x = 184,606,524.17/15,399.91
  6. Step 6: Final answer
    x = 11,987.51

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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.