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Finding the Fourth Proportional to 21,835.84, 30,133.92 and 12,275.92

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Solution

The fourth proportional to 21,835.84, 30,133.92 and 12,275.92 is: 16,941.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.84 : 30,133.92 = 12,275.92 : x
  2. Step 2: Convert to fraction form
    21,835.84/30,133.92 = 12,275.92/x
  3. Step 3: Cross multiply
    21,835.84x = 30,133.92 × 12,275.92
  4. Step 4: Simplify right side
    21,835.84x = 369,921,591.21
  5. Step 5: Solve for x
    x = 369,921,591.21/21,835.84
  6. Step 6: Final answer
    x = 16,941.03

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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.