Home / 20,355.96-28,100.40-11,973

Finding the Fourth Proportional to 20,355.96, 28,100.40 and 11,973

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Solution

The fourth proportional to 20,355.96, 28,100.40 and 11,973 is: 16,528.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.96 : 28,100.40 = 11,973 : x
  2. Step 2: Convert to fraction form
    20,355.96/28,100.40 = 11,973/x
  3. Step 3: Cross multiply
    20,355.96x = 28,100.40 × 11,973
  4. Step 4: Simplify right side
    20,355.96x = 336,446,089.20
  5. Step 5: Solve for x
    x = 336,446,089.20/20,355.96
  6. Step 6: Final answer
    x = 16,528.14

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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.