Home / 21,161.20-29,192.64-14,877.28

Finding the Fourth Proportional to 21,161.20, 29,192.64 and 14,877.28

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Solution

The fourth proportional to 21,161.20, 29,192.64 and 14,877.28 is: 20,523.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.20 : 29,192.64 = 14,877.28 : x
  2. Step 2: Convert to fraction form
    21,161.20/29,192.64 = 14,877.28/x
  3. Step 3: Cross multiply
    21,161.20x = 29,192.64 × 14,877.28
  4. Step 4: Simplify right side
    21,161.20x = 434,307,079.22
  5. Step 5: Solve for x
    x = 434,307,079.22/21,161.20
  6. Step 6: Final answer
    x = 20,523.75

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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.