Home / 12,926.72-19,336.44-12,139.40

Finding the Fourth Proportional to 12,926.72, 19,336.44 and 12,139.40

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Solution

The fourth proportional to 12,926.72, 19,336.44 and 12,139.40 is: 18,158.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.72 : 19,336.44 = 12,139.40 : x
  2. Step 2: Convert to fraction form
    12,926.72/19,336.44 = 12,139.40/x
  3. Step 3: Cross multiply
    12,926.72x = 19,336.44 × 12,139.40
  4. Step 4: Simplify right side
    12,926.72x = 234,732,779.74
  5. Step 5: Solve for x
    x = 234,732,779.74/12,926.72
  6. Step 6: Final answer
    x = 18,158.73

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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.