Home / 12,180.70-18,271.05-4,785.40

Finding the Fourth Proportional to 12,180.70, 18,271.05 and 4,785.40

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Solution

The fourth proportional to 12,180.70, 18,271.05 and 4,785.40 is: 7,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.70 : 18,271.05 = 4,785.40 : x
  2. Step 2: Convert to fraction form
    12,180.70/18,271.05 = 4,785.40/x
  3. Step 3: Cross multiply
    12,180.70x = 18,271.05 × 4,785.40
  4. Step 4: Simplify right side
    12,180.70x = 87,434,282.67
  5. Step 5: Solve for x
    x = 87,434,282.67/12,180.70
  6. Step 6: Final answer
    x = 7,178.10

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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.