Home / 15,400.68-21,252.78-8,686.20

Finding the Fourth Proportional to 15,400.68, 21,252.78 and 8,686.20

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Solution

The fourth proportional to 15,400.68, 21,252.78 and 8,686.20 is: 11,986.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.68 : 21,252.78 = 8,686.20 : x
  2. Step 2: Convert to fraction form
    15,400.68/21,252.78 = 8,686.20/x
  3. Step 3: Cross multiply
    15,400.68x = 21,252.78 × 8,686.20
  4. Step 4: Simplify right side
    15,400.68x = 184,605,897.64
  5. Step 5: Solve for x
    x = 184,605,897.64/15,400.68
  6. Step 6: Final answer
    x = 11,986.87

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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.