Home / 13,653.76-20,436.36-12,669.52

Finding the Fourth Proportional to 13,653.76, 20,436.36 and 12,669.52

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Solution

The fourth proportional to 13,653.76, 20,436.36 and 12,669.52 is: 18,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,653.76 : 20,436.36 = 12,669.52 : x
  2. Step 2: Convert to fraction form
    13,653.76/20,436.36 = 12,669.52/x
  3. Step 3: Cross multiply
    13,653.76x = 20,436.36 × 12,669.52
  4. Step 4: Simplify right side
    13,653.76x = 258,918,871.75
  5. Step 5: Solve for x
    x = 258,918,871.75/13,653.76
  6. Step 6: Final answer
    x = 18,963.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.