Home / 20,807.55-28,714.64-11,376.09

Finding the Fourth Proportional to 20,807.55, 28,714.64 and 11,376.09

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Solution

The fourth proportional to 20,807.55, 28,714.64 and 11,376.09 is: 15,699.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.55 : 28,714.64 = 11,376.09 : x
  2. Step 2: Convert to fraction form
    20,807.55/28,714.64 = 11,376.09/x
  3. Step 3: Cross multiply
    20,807.55x = 28,714.64 × 11,376.09
  4. Step 4: Simplify right side
    20,807.55x = 326,660,272.08
  5. Step 5: Solve for x
    x = 326,660,272.08/20,807.55
  6. Step 6: Final answer
    x = 15,699.12

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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.