Home / 10,266.40-15,371.52-7,139.80

Finding the Fourth Proportional to 10,266.40, 15,371.52 and 7,139.80

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Solution

The fourth proportional to 10,266.40, 15,371.52 and 7,139.80 is: 10,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,266.40 : 15,371.52 = 7,139.80 : x
  2. Step 2: Convert to fraction form
    10,266.40/15,371.52 = 7,139.80/x
  3. Step 3: Cross multiply
    10,266.40x = 15,371.52 × 7,139.80
  4. Step 4: Simplify right side
    10,266.40x = 109,749,578.50
  5. Step 5: Solve for x
    x = 109,749,578.50/10,266.40
  6. Step 6: Final answer
    x = 10,690.17

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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.