Home / 20,742.74-28,625.40-12,784.52

Finding the Fourth Proportional to 20,742.74, 28,625.40 and 12,784.52

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Solution

The fourth proportional to 20,742.74, 28,625.40 and 12,784.52 is: 17,642.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.74 : 28,625.40 = 12,784.52 : x
  2. Step 2: Convert to fraction form
    20,742.74/28,625.40 = 12,784.52/x
  3. Step 3: Cross multiply
    20,742.74x = 28,625.40 × 12,784.52
  4. Step 4: Simplify right side
    20,742.74x = 365,961,998.81
  5. Step 5: Solve for x
    x = 365,961,998.81/20,742.74
  6. Step 6: Final answer
    x = 17,642.90

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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.