Home / 20,968.89-28,944.63-13,897.59

Finding the Fourth Proportional to 20,968.89, 28,944.63 and 13,897.59

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Solution

The fourth proportional to 20,968.89, 28,944.63 and 13,897.59 is: 19,183.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.89 : 28,944.63 = 13,897.59 : x
  2. Step 2: Convert to fraction form
    20,968.89/28,944.63 = 13,897.59/x
  3. Step 3: Cross multiply
    20,968.89x = 28,944.63 × 13,897.59
  4. Step 4: Simplify right side
    20,968.89x = 402,260,600.44
  5. Step 5: Solve for x
    x = 402,260,600.44/20,968.89
  6. Step 6: Final answer
    x = 19,183.69

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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.