Home / 21,621.84-29,838.18-11,685.84

Finding the Fourth Proportional to 21,621.84, 29,838.18 and 11,685.84

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Solution

The fourth proportional to 21,621.84, 29,838.18 and 11,685.84 is: 16,126.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.84 : 29,838.18 = 11,685.84 : x
  2. Step 2: Convert to fraction form
    21,621.84/29,838.18 = 11,685.84/x
  3. Step 3: Cross multiply
    21,621.84x = 29,838.18 × 11,685.84
  4. Step 4: Simplify right side
    21,621.84x = 348,684,197.37
  5. Step 5: Solve for x
    x = 348,684,197.37/21,621.84
  6. Step 6: Final answer
    x = 16,126.48

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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.