Home / 28,434-42,649.20-11,105.28

Finding the Fourth Proportional to 28,434, 42,649.20 and 11,105.28

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Solution

The fourth proportional to 28,434, 42,649.20 and 11,105.28 is: 16,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434 : 42,649.20 = 11,105.28 : x
  2. Step 2: Convert to fraction form
    28,434/42,649.20 = 11,105.28/x
  3. Step 3: Cross multiply
    28,434x = 42,649.20 × 11,105.28
  4. Step 4: Simplify right side
    28,434x = 473,631,307.78
  5. Step 5: Solve for x
    x = 473,631,307.78/28,434
  6. Step 6: Final answer
    x = 16,657.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.