Home / 28,214.24-42,340.80-12,649.28

Finding the Fourth Proportional to 28,214.24, 42,340.80 and 12,649.28

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Solution

The fourth proportional to 28,214.24, 42,340.80 and 12,649.28 is: 18,982.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,214.24 : 42,340.80 = 12,649.28 : x
  2. Step 2: Convert to fraction form
    28,214.24/42,340.80 = 12,649.28/x
  3. Step 3: Cross multiply
    28,214.24x = 42,340.80 × 12,649.28
  4. Step 4: Simplify right side
    28,214.24x = 535,580,634.62
  5. Step 5: Solve for x
    x = 535,580,634.62/28,214.24
  6. Step 6: Final answer
    x = 18,982.64

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1.5x scale

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.