Home / 28,139.36-42,198.45-11,490.48

Finding the Fourth Proportional to 28,139.36, 42,198.45 and 11,490.48

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Solution

The fourth proportional to 28,139.36, 42,198.45 and 11,490.48 is: 17,231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.36 : 42,198.45 = 11,490.48 : x
  2. Step 2: Convert to fraction form
    28,139.36/42,198.45 = 11,490.48/x
  3. Step 3: Cross multiply
    28,139.36x = 42,198.45 × 11,490.48
  4. Step 4: Simplify right side
    28,139.36x = 484,880,445.76
  5. Step 5: Solve for x
    x = 484,880,445.76/28,139.36
  6. Step 6: Final answer
    x = 17,231.40

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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.