Home / 28,778.47-43,173.56-12,138.56

Finding the Fourth Proportional to 28,778.47, 43,173.56 and 12,138.56

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Solution

The fourth proportional to 28,778.47, 43,173.56 and 12,138.56 is: 18,210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.47 : 43,173.56 = 12,138.56 : x
  2. Step 2: Convert to fraction form
    28,778.47/43,173.56 = 12,138.56/x
  3. Step 3: Cross multiply
    28,778.47x = 43,173.56 × 12,138.56
  4. Step 4: Simplify right side
    28,778.47x = 524,064,956.41
  5. Step 5: Solve for x
    x = 524,064,956.41/28,778.47
  6. Step 6: Final answer
    x = 18,210.31

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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.