Home / 21,382.85-29,492.30-18,963.05

Finding the Fourth Proportional to 21,382.85, 29,492.30 and 18,963.05

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Solution

The fourth proportional to 21,382.85, 29,492.30 and 18,963.05 is: 26,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,382.85 : 29,492.30 = 18,963.05 : x
  2. Step 2: Convert to fraction form
    21,382.85/29,492.30 = 18,963.05/x
  3. Step 3: Cross multiply
    21,382.85x = 29,492.30 × 18,963.05
  4. Step 4: Simplify right side
    21,382.85x = 559,263,859.46
  5. Step 5: Solve for x
    x = 559,263,859.46/21,382.85
  6. Step 6: Final answer
    x = 26,154.78

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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.