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Finding the Fourth Proportional to 21,575.58, 29,770.59 and 19,831.58

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Solution

The fourth proportional to 21,575.58, 29,770.59 and 19,831.58 is: 27,364.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,575.58 : 29,770.59 = 19,831.58 : x
  2. Step 2: Convert to fraction form
    21,575.58/29,770.59 = 19,831.58/x
  3. Step 3: Cross multiply
    21,575.58x = 29,770.59 × 19,831.58
  4. Step 4: Simplify right side
    21,575.58x = 590,397,874.39
  5. Step 5: Solve for x
    x = 590,397,874.39/21,575.58
  6. Step 6: Final answer
    x = 27,364.18

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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.