Home / 12,689.74-19,010.13-7,126.21

Finding the Fourth Proportional to 12,689.74, 19,010.13 and 7,126.21

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Solution

The fourth proportional to 12,689.74, 19,010.13 and 7,126.21 is: 10,675.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.74 : 19,010.13 = 7,126.21 : x
  2. Step 2: Convert to fraction form
    12,689.74/19,010.13 = 7,126.21/x
  3. Step 3: Cross multiply
    12,689.74x = 19,010.13 × 7,126.21
  4. Step 4: Simplify right side
    12,689.74x = 135,470,178.51
  5. Step 5: Solve for x
    x = 135,470,178.51/12,689.74
  6. Step 6: Final answer
    x = 10,675.57

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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.