Home / 10,939.60-16,421.55-8,485.30

Finding the Fourth Proportional to 10,939.60, 16,421.55 and 8,485.30

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Solution

The fourth proportional to 10,939.60, 16,421.55 and 8,485.30 is: 12,737.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.60 : 16,421.55 = 8,485.30 : x
  2. Step 2: Convert to fraction form
    10,939.60/16,421.55 = 8,485.30/x
  3. Step 3: Cross multiply
    10,939.60x = 16,421.55 × 8,485.30
  4. Step 4: Simplify right side
    10,939.60x = 139,341,778.22
  5. Step 5: Solve for x
    x = 139,341,778.22/10,939.60
  6. Step 6: Final answer
    x = 12,737.37

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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.