Home / 10,228.49-15,328.35-8,139.20

Finding the Fourth Proportional to 10,228.49, 15,328.35 and 8,139.20

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Solution

The fourth proportional to 10,228.49, 15,328.35 and 8,139.20 is: 12,197.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,228.49 : 15,328.35 = 8,139.20 : x
  2. Step 2: Convert to fraction form
    10,228.49/15,328.35 = 8,139.20/x
  3. Step 3: Cross multiply
    10,228.49x = 15,328.35 × 8,139.20
  4. Step 4: Simplify right side
    10,228.49x = 124,760,429.68
  5. Step 5: Solve for x
    x = 124,760,429.68/10,228.49
  6. Step 6: Final answer
    x = 12,197.35

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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.