Home / 12,148.20-18,137.08-10,280.36

Finding the Fourth Proportional to 12,148.20, 18,137.08 and 10,280.36

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Solution

The fourth proportional to 12,148.20, 18,137.08 and 10,280.36 is: 15,348.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.20 : 18,137.08 = 10,280.36 : x
  2. Step 2: Convert to fraction form
    12,148.20/18,137.08 = 10,280.36/x
  3. Step 3: Cross multiply
    12,148.20x = 18,137.08 × 10,280.36
  4. Step 4: Simplify right side
    12,148.20x = 186,455,711.75
  5. Step 5: Solve for x
    x = 186,455,711.75/12,148.20
  6. Step 6: Final answer
    x = 15,348.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.