Home / 13,657.21-20,478.83-6,637.55

Finding the Fourth Proportional to 13,657.21, 20,478.83 and 6,637.55

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Solution

The fourth proportional to 13,657.21, 20,478.83 and 6,637.55 is: 9,952.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.21 : 20,478.83 = 6,637.55 : x
  2. Step 2: Convert to fraction form
    13,657.21/20,478.83 = 6,637.55/x
  3. Step 3: Cross multiply
    13,657.21x = 20,478.83 × 6,637.55
  4. Step 4: Simplify right side
    13,657.21x = 135,929,122.48
  5. Step 5: Solve for x
    x = 135,929,122.48/13,657.21
  6. Step 6: Final answer
    x = 9,952.92

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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.