Home / 20,714.81-28,588.43-12,761.69

Finding the Fourth Proportional to 20,714.81, 28,588.43 and 12,761.69

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Solution

The fourth proportional to 20,714.81, 28,588.43 and 12,761.69 is: 17,612.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,714.81 : 28,588.43 = 12,761.69 : x
  2. Step 2: Convert to fraction form
    20,714.81/28,588.43 = 12,761.69/x
  3. Step 3: Cross multiply
    20,714.81x = 28,588.43 × 12,761.69
  4. Step 4: Simplify right side
    20,714.81x = 364,836,681.25
  5. Step 5: Solve for x
    x = 364,836,681.25/20,714.81
  6. Step 6: Final answer
    x = 17,612.36

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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.