Home / 20,342.14-28,070.78-11,388.12

Finding the Fourth Proportional to 20,342.14, 28,070.78 and 11,388.12

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Solution

The fourth proportional to 20,342.14, 28,070.78 and 11,388.12 is: 15,714.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.14 : 28,070.78 = 11,388.12 : x
  2. Step 2: Convert to fraction form
    20,342.14/28,070.78 = 11,388.12/x
  3. Step 3: Cross multiply
    20,342.14x = 28,070.78 × 11,388.12
  4. Step 4: Simplify right side
    20,342.14x = 319,673,411.13
  5. Step 5: Solve for x
    x = 319,673,411.13/20,342.14
  6. Step 6: Final answer
    x = 15,714.84

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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.