Home / 20,374.31-28,116.62-11,421.87

Finding the Fourth Proportional to 20,374.31, 28,116.62 and 11,421.87

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Solution

The fourth proportional to 20,374.31, 28,116.62 and 11,421.87 is: 15,762.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.31 : 28,116.62 = 11,421.87 : x
  2. Step 2: Convert to fraction form
    20,374.31/28,116.62 = 11,421.87/x
  3. Step 3: Cross multiply
    20,374.31x = 28,116.62 × 11,421.87
  4. Step 4: Simplify right side
    20,374.31x = 321,144,321.37
  5. Step 5: Solve for x
    x = 321,144,321.37/20,374.31
  6. Step 6: Final answer
    x = 15,762.22

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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.