Home / 21,886.02-30,204.93-12,936.42

Finding the Fourth Proportional to 21,886.02, 30,204.93 and 12,936.42

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Solution

The fourth proportional to 21,886.02, 30,204.93 and 12,936.42 is: 17,853.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.02 : 30,204.93 = 12,936.42 : x
  2. Step 2: Convert to fraction form
    21,886.02/30,204.93 = 12,936.42/x
  3. Step 3: Cross multiply
    21,886.02x = 30,204.93 × 12,936.42
  4. Step 4: Simplify right side
    21,886.02x = 390,743,660.55
  5. Step 5: Solve for x
    x = 390,743,660.55/21,886.02
  6. Step 6: Final answer
    x = 17,853.57

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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.