Home / 13,637.16-20,436.30-7,781.67

Finding the Fourth Proportional to 13,637.16, 20,436.30 and 7,781.67

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Solution

The fourth proportional to 13,637.16, 20,436.30 and 7,781.67 is: 11,661.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,637.16 : 20,436.30 = 7,781.67 : x
  2. Step 2: Convert to fraction form
    13,637.16/20,436.30 = 7,781.67/x
  3. Step 3: Cross multiply
    13,637.16x = 20,436.30 × 7,781.67
  4. Step 4: Simplify right side
    13,637.16x = 159,028,542.62
  5. Step 5: Solve for x
    x = 159,028,542.62/13,637.16
  6. Step 6: Final answer
    x = 11,661.41

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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.