Home / 18,669.86-28,009.99-8,140.80

Finding the Fourth Proportional to 18,669.86, 28,009.99 and 8,140.80

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Solution

The fourth proportional to 18,669.86, 28,009.99 and 8,140.80 is: 12,213.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.86 : 28,009.99 = 8,140.80 : x
  2. Step 2: Convert to fraction form
    18,669.86/28,009.99 = 8,140.80/x
  3. Step 3: Cross multiply
    18,669.86x = 28,009.99 × 8,140.80
  4. Step 4: Simplify right side
    18,669.86x = 228,023,726.59
  5. Step 5: Solve for x
    x = 228,023,726.59/18,669.86
  6. Step 6: Final answer
    x = 12,213.47

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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.