Home / 15,714.84-21,686.94-8,641.72

Finding the Fourth Proportional to 15,714.84, 21,686.94 and 8,641.72

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Solution

The fourth proportional to 15,714.84, 21,686.94 and 8,641.72 is: 11,925.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,714.84 : 21,686.94 = 8,641.72 : x
  2. Step 2: Convert to fraction form
    15,714.84/21,686.94 = 8,641.72/x
  3. Step 3: Cross multiply
    15,714.84x = 21,686.94 × 8,641.72
  4. Step 4: Simplify right side
    15,714.84x = 187,412,490.25
  5. Step 5: Solve for x
    x = 187,412,490.25/15,714.84
  6. Step 6: Final answer
    x = 11,925.83

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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.