Home / 12,926.18-19,383.21-5,428.14

Finding the Fourth Proportional to 12,926.18, 19,383.21 and 5,428.14

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Solution

The fourth proportional to 12,926.18, 19,383.21 and 5,428.14 is: 8,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.18 : 19,383.21 = 5,428.14 : x
  2. Step 2: Convert to fraction form
    12,926.18/19,383.21 = 5,428.14/x
  3. Step 3: Cross multiply
    12,926.18x = 19,383.21 × 5,428.14
  4. Step 4: Simplify right side
    12,926.18x = 105,214,680.61
  5. Step 5: Solve for x
    x = 105,214,680.61/12,926.18
  6. Step 6: Final answer
    x = 8,139.66

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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.