Home / 20,485.49-28,270.50-11,533.31

Finding the Fourth Proportional to 20,485.49, 28,270.50 and 11,533.31

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Solution

The fourth proportional to 20,485.49, 28,270.50 and 11,533.31 is: 15,916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.49 : 28,270.50 = 11,533.31 : x
  2. Step 2: Convert to fraction form
    20,485.49/28,270.50 = 11,533.31/x
  3. Step 3: Cross multiply
    20,485.49x = 28,270.50 × 11,533.31
  4. Step 4: Simplify right side
    20,485.49x = 326,052,506.15
  5. Step 5: Solve for x
    x = 326,052,506.15/20,485.49
  6. Step 6: Final answer
    x = 15,916.27

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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.