Home / 20,807.90-28,714.86-11,376.46

Finding the Fourth Proportional to 20,807.90, 28,714.86 and 11,376.46

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Solution

The fourth proportional to 20,807.90, 28,714.86 and 11,376.46 is: 15,699.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.90 : 28,714.86 = 11,376.46 : x
  2. Step 2: Convert to fraction form
    20,807.90/28,714.86 = 11,376.46/x
  3. Step 3: Cross multiply
    20,807.90x = 28,714.86 × 11,376.46
  4. Step 4: Simplify right side
    20,807.90x = 326,673,456.20
  5. Step 5: Solve for x
    x = 326,673,456.20/20,807.90
  6. Step 6: Final answer
    x = 15,699.49

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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.