Home / 13,545.42-20,319.81-4,778.58

Finding the Fourth Proportional to 13,545.42, 20,319.81 and 4,778.58

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Solution

The fourth proportional to 13,545.42, 20,319.81 and 4,778.58 is: 7,168.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.42 : 20,319.81 = 4,778.58 : x
  2. Step 2: Convert to fraction form
    13,545.42/20,319.81 = 4,778.58/x
  3. Step 3: Cross multiply
    13,545.42x = 20,319.81 × 4,778.58
  4. Step 4: Simplify right side
    13,545.42x = 97,099,837.67
  5. Step 5: Solve for x
    x = 97,099,837.67/13,545.42
  6. Step 6: Final answer
    x = 7,168.46

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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.