Home / 21,912.81-30,254.27-12,963.18

Finding the Fourth Proportional to 21,912.81, 30,254.27 and 12,963.18

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Solution

The fourth proportional to 21,912.81, 30,254.27 and 12,963.18 is: 17,897.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.81 : 30,254.27 = 12,963.18 : x
  2. Step 2: Convert to fraction form
    21,912.81/30,254.27 = 12,963.18/x
  3. Step 3: Cross multiply
    21,912.81x = 30,254.27 × 12,963.18
  4. Step 4: Simplify right side
    21,912.81x = 392,191,482.96
  5. Step 5: Solve for x
    x = 392,191,482.96/21,912.81
  6. Step 6: Final answer
    x = 17,897.82

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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.