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Finding the Fourth Proportional to 28,513, 39,347.94 and 15,940.18

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Solution

The fourth proportional to 28,513, 39,347.94 and 15,940.18 is: 21,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513 : 39,347.94 = 15,940.18 : x
  2. Step 2: Convert to fraction form
    28,513/39,347.94 = 15,940.18/x
  3. Step 3: Cross multiply
    28,513x = 39,347.94 × 15,940.18
  4. Step 4: Simplify right side
    28,513x = 627,213,246.23
  5. Step 5: Solve for x
    x = 627,213,246.23/28,513
  6. Step 6: Final answer
    x = 21,997.45

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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.