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Finding the Fourth Proportional to 21,774.60, 30,048.10 and 12,342.96

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Solution

The fourth proportional to 21,774.60, 30,048.10 and 12,342.96 is: 17,032.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,774.60 : 30,048.10 = 12,342.96 : x
  2. Step 2: Convert to fraction form
    21,774.60/30,048.10 = 12,342.96/x
  3. Step 3: Cross multiply
    21,774.60x = 30,048.10 × 12,342.96
  4. Step 4: Simplify right side
    21,774.60x = 370,882,465.52
  5. Step 5: Solve for x
    x = 370,882,465.52/21,774.60
  6. Step 6: Final answer
    x = 17,032.80

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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.