Home / 28,642.87-39,546.43-21,916.47

Finding the Fourth Proportional to 28,642.87, 39,546.43 and 21,916.47

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Solution

The fourth proportional to 28,642.87, 39,546.43 and 21,916.47 is: 30,259.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.87 : 39,546.43 = 21,916.47 : x
  2. Step 2: Convert to fraction form
    28,642.87/39,546.43 = 21,916.47/x
  3. Step 3: Cross multiply
    28,642.87x = 39,546.43 × 21,916.47
  4. Step 4: Simplify right side
    28,642.87x = 866,718,240.21
  5. Step 5: Solve for x
    x = 866,718,240.21/28,642.87
  6. Step 6: Final answer
    x = 30,259.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.