Home / 12,154.05-18,220.95-5,139.45

Finding the Fourth Proportional to 12,154.05, 18,220.95 and 5,139.45

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Solution

The fourth proportional to 12,154.05, 18,220.95 and 5,139.45 is: 7,704.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.05 : 18,220.95 = 5,139.45 : x
  2. Step 2: Convert to fraction form
    12,154.05/18,220.95 = 5,139.45/x
  3. Step 3: Cross multiply
    12,154.05x = 18,220.95 × 5,139.45
  4. Step 4: Simplify right side
    12,154.05x = 93,645,661.48
  5. Step 5: Solve for x
    x = 93,645,661.48/12,154.05
  6. Step 6: Final answer
    x = 7,704.89

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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.