Home / 20,683.60-28,545.30-12,188.36

Finding the Fourth Proportional to 20,683.60, 28,545.30 and 12,188.36

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Solution

The fourth proportional to 20,683.60, 28,545.30 and 12,188.36 is: 16,821.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.60 : 28,545.30 = 12,188.36 : x
  2. Step 2: Convert to fraction form
    20,683.60/28,545.30 = 12,188.36/x
  3. Step 3: Cross multiply
    20,683.60x = 28,545.30 × 12,188.36
  4. Step 4: Simplify right side
    20,683.60x = 347,920,406.64
  5. Step 5: Solve for x
    x = 347,920,406.64/20,683.60
  6. Step 6: Final answer
    x = 16,821.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.