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Finding the Fourth Proportional to 21,107.88, 29,118.18 and 19,607.08

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Solution

The fourth proportional to 21,107.88, 29,118.18 and 19,607.08 is: 27,047.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.88 : 29,118.18 = 19,607.08 : x
  2. Step 2: Convert to fraction form
    21,107.88/29,118.18 = 19,607.08/x
  3. Step 3: Cross multiply
    21,107.88x = 29,118.18 × 19,607.08
  4. Step 4: Simplify right side
    21,107.88x = 570,922,484.71
  5. Step 5: Solve for x
    x = 570,922,484.71/21,107.88
  6. Step 6: Final answer
    x = 27,047.84

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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.