Home / 21,789.96-30,068.73-12,835.74

Finding the Fourth Proportional to 21,789.96, 30,068.73 and 12,835.74

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Solution

The fourth proportional to 21,789.96, 30,068.73 and 12,835.74 is: 17,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.96 : 30,068.73 = 12,835.74 : x
  2. Step 2: Convert to fraction form
    21,789.96/30,068.73 = 12,835.74/x
  3. Step 3: Cross multiply
    21,789.96x = 30,068.73 × 12,835.74
  4. Step 4: Simplify right side
    21,789.96x = 385,954,400.41
  5. Step 5: Solve for x
    x = 385,954,400.41/21,789.96
  6. Step 6: Final answer
    x = 17,712.49

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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.