Home / 28,085.95-42,128.79-11,442.07

Finding the Fourth Proportional to 28,085.95, 42,128.79 and 11,442.07

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Solution

The fourth proportional to 28,085.95, 42,128.79 and 11,442.07 is: 17,163.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.95 : 42,128.79 = 11,442.07 : x
  2. Step 2: Convert to fraction form
    28,085.95/42,128.79 = 11,442.07/x
  3. Step 3: Cross multiply
    28,085.95x = 42,128.79 × 11,442.07
  4. Step 4: Simplify right side
    28,085.95x = 482,040,564.20
  5. Step 5: Solve for x
    x = 482,040,564.20/28,085.95
  6. Step 6: Final answer
    x = 17,163.05

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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.