Home / 12,926.79-19,390.29-7,080.21

Finding the Fourth Proportional to 12,926.79, 19,390.29 and 7,080.21

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Solution

The fourth proportional to 12,926.79, 19,390.29 and 7,080.21 is: 10,620.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.79 : 19,390.29 = 7,080.21 : x
  2. Step 2: Convert to fraction form
    12,926.79/19,390.29 = 7,080.21/x
  3. Step 3: Cross multiply
    12,926.79x = 19,390.29 × 7,080.21
  4. Step 4: Simplify right side
    12,926.79x = 137,287,289.76
  5. Step 5: Solve for x
    x = 137,287,289.76/12,926.79
  6. Step 6: Final answer
    x = 10,620.37

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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.