Home / 15,686.87-21,651.65-9,714.94

Finding the Fourth Proportional to 15,686.87, 21,651.65 and 9,714.94

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Solution

The fourth proportional to 15,686.87, 21,651.65 and 9,714.94 is: 13,408.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.87 : 21,651.65 = 9,714.94 : x
  2. Step 2: Convert to fraction form
    15,686.87/21,651.65 = 9,714.94/x
  3. Step 3: Cross multiply
    15,686.87x = 21,651.65 × 9,714.94
  4. Step 4: Simplify right side
    15,686.87x = 210,344,469.02
  5. Step 5: Solve for x
    x = 210,344,469.02/15,686.87
  6. Step 6: Final answer
    x = 13,408.96

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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.