Home / 21,816.16-30,103.02-12,254.22

Finding the Fourth Proportional to 21,816.16, 30,103.02 and 12,254.22

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Solution

The fourth proportional to 21,816.16, 30,103.02 and 12,254.22 is: 16,908.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.16 : 30,103.02 = 12,254.22 : x
  2. Step 2: Convert to fraction form
    21,816.16/30,103.02 = 12,254.22/x
  3. Step 3: Cross multiply
    21,816.16x = 30,103.02 × 12,254.22
  4. Step 4: Simplify right side
    21,816.16x = 368,889,029.74
  5. Step 5: Solve for x
    x = 368,889,029.74/21,816.16
  6. Step 6: Final answer
    x = 16,908.98

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Double scale
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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.