Home / 20,994.48-28,972.41-11,434.39

Finding the Fourth Proportional to 20,994.48, 28,972.41 and 11,434.39

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Solution

The fourth proportional to 20,994.48, 28,972.41 and 11,434.39 is: 15,779.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.48 : 28,972.41 = 11,434.39 : x
  2. Step 2: Convert to fraction form
    20,994.48/28,972.41 = 11,434.39/x
  3. Step 3: Cross multiply
    20,994.48x = 28,972.41 × 11,434.39
  4. Step 4: Simplify right side
    20,994.48x = 331,281,835.18
  5. Step 5: Solve for x
    x = 331,281,835.18/20,994.48
  6. Step 6: Final answer
    x = 15,779.47

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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.