Home / 21,010.60-28,975.12-15,336.36

Finding the Fourth Proportional to 21,010.60, 28,975.12 and 15,336.36

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Solution

The fourth proportional to 21,010.60, 28,975.12 and 15,336.36 is: 21,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.60 : 28,975.12 = 15,336.36 : x
  2. Step 2: Convert to fraction form
    21,010.60/28,975.12 = 15,336.36/x
  3. Step 3: Cross multiply
    21,010.60x = 28,975.12 × 15,336.36
  4. Step 4: Simplify right side
    21,010.60x = 444,372,871.36
  5. Step 5: Solve for x
    x = 444,372,871.36/21,010.60
  6. Step 6: Final answer
    x = 21,149.94

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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.