Home / 39,138.68-58,680.60-12,475.64

Finding the Fourth Proportional to 39,138.68, 58,680.60 and 12,475.64

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Solution

The fourth proportional to 39,138.68, 58,680.60 and 12,475.64 is: 18,704.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.68 : 58,680.60 = 12,475.64 : x
  2. Step 2: Convert to fraction form
    39,138.68/58,680.60 = 12,475.64/x
  3. Step 3: Cross multiply
    39,138.68x = 58,680.60 × 12,475.64
  4. Step 4: Simplify right side
    39,138.68x = 732,078,040.58
  5. Step 5: Solve for x
    x = 732,078,040.58/39,138.68
  6. Step 6: Final answer
    x = 18,704.72

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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.