Home / 21,853.94-30,172.23-15,137.15

Finding the Fourth Proportional to 21,853.94, 30,172.23 and 15,137.15

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Solution

The fourth proportional to 21,853.94, 30,172.23 and 15,137.15 is: 20,898.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.94 : 30,172.23 = 15,137.15 : x
  2. Step 2: Convert to fraction form
    21,853.94/30,172.23 = 15,137.15/x
  3. Step 3: Cross multiply
    21,853.94x = 30,172.23 × 15,137.15
  4. Step 4: Simplify right side
    21,853.94x = 456,721,420.48
  5. Step 5: Solve for x
    x = 456,721,420.48/21,853.94
  6. Step 6: Final answer
    x = 20,898.82

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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.