Home / 13,605.22-20,389.38-12,239.70

Finding the Fourth Proportional to 13,605.22, 20,389.38 and 12,239.70

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Solution

The fourth proportional to 13,605.22, 20,389.38 and 12,239.70 is: 18,342.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.22 : 20,389.38 = 12,239.70 : x
  2. Step 2: Convert to fraction form
    13,605.22/20,389.38 = 12,239.70/x
  3. Step 3: Cross multiply
    13,605.22x = 20,389.38 × 12,239.70
  4. Step 4: Simplify right side
    13,605.22x = 249,559,894.39
  5. Step 5: Solve for x
    x = 249,559,894.39/13,605.22
  6. Step 6: Final answer
    x = 18,342.95

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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.