Home / 21,007.08-28,989.90-11,575.44

Finding the Fourth Proportional to 21,007.08, 28,989.90 and 11,575.44

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Solution

The fourth proportional to 21,007.08, 28,989.90 and 11,575.44 is: 15,974.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.08 : 28,989.90 = 11,575.44 : x
  2. Step 2: Convert to fraction form
    21,007.08/28,989.90 = 11,575.44/x
  3. Step 3: Cross multiply
    21,007.08x = 28,989.90 × 11,575.44
  4. Step 4: Simplify right side
    21,007.08x = 335,570,848.06
  5. Step 5: Solve for x
    x = 335,570,848.06/21,007.08
  6. Step 6: Final answer
    x = 15,974.18

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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.