Home / 12,271.05-18,358.68-10,778.40

Finding the Fourth Proportional to 12,271.05, 18,358.68 and 10,778.40

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Solution

The fourth proportional to 12,271.05, 18,358.68 and 10,778.40 is: 16,125.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,271.05 : 18,358.68 = 10,778.40 : x
  2. Step 2: Convert to fraction form
    12,271.05/18,358.68 = 10,778.40/x
  3. Step 3: Cross multiply
    12,271.05x = 18,358.68 × 10,778.40
  4. Step 4: Simplify right side
    12,271.05x = 197,877,196.51
  5. Step 5: Solve for x
    x = 197,877,196.51/12,271.05
  6. Step 6: Final answer
    x = 16,125.53

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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.