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Finding the Fourth Proportional to 28,343.88, 39,114.63 and 15,768.63

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Solution

The fourth proportional to 28,343.88, 39,114.63 and 15,768.63 is: 21,760.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.88 : 39,114.63 = 15,768.63 : x
  2. Step 2: Convert to fraction form
    28,343.88/39,114.63 = 15,768.63/x
  3. Step 3: Cross multiply
    28,343.88x = 39,114.63 × 15,768.63
  4. Step 4: Simplify right side
    28,343.88x = 616,784,128.06
  5. Step 5: Solve for x
    x = 616,784,128.06/28,343.88
  6. Step 6: Final answer
    x = 21,760.75

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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.