Home / 21,042.28-29,039.78-12,210.28

Finding the Fourth Proportional to 21,042.28, 29,039.78 and 12,210.28

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Solution

The fourth proportional to 21,042.28, 29,039.78 and 12,210.28 is: 16,851.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.28 : 29,039.78 = 12,210.28 : x
  2. Step 2: Convert to fraction form
    21,042.28/29,039.78 = 12,210.28/x
  3. Step 3: Cross multiply
    21,042.28x = 29,039.78 × 12,210.28
  4. Step 4: Simplify right side
    21,042.28x = 354,583,844.94
  5. Step 5: Solve for x
    x = 354,583,844.94/21,042.28
  6. Step 6: Final answer
    x = 16,851.02

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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.