Home / 13,436.69-20,125.33-8,422.72

Finding the Fourth Proportional to 13,436.69, 20,125.33 and 8,422.72

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Solution

The fourth proportional to 13,436.69, 20,125.33 and 8,422.72 is: 12,615.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.69 : 20,125.33 = 8,422.72 : x
  2. Step 2: Convert to fraction form
    13,436.69/20,125.33 = 8,422.72/x
  3. Step 3: Cross multiply
    13,436.69x = 20,125.33 × 8,422.72
  4. Step 4: Simplify right side
    13,436.69x = 169,509,948.13
  5. Step 5: Solve for x
    x = 169,509,948.13/13,436.69
  6. Step 6: Final answer
    x = 12,615.46

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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.