Home / 15,686.75-21,647.31-8,516.43

Finding the Fourth Proportional to 15,686.75, 21,647.31 and 8,516.43

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Solution

The fourth proportional to 15,686.75, 21,647.31 and 8,516.43 is: 11,752.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.75 : 21,647.31 = 8,516.43 : x
  2. Step 2: Convert to fraction form
    15,686.75/21,647.31 = 8,516.43/x
  3. Step 3: Cross multiply
    15,686.75x = 21,647.31 × 8,516.43
  4. Step 4: Simplify right side
    15,686.75x = 184,357,800.30
  5. Step 5: Solve for x
    x = 184,357,800.30/15,686.75
  6. Step 6: Final answer
    x = 11,752.45

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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.