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Finding the Fourth Proportional to 28,701, 39,607.38 and 16,128.18

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Solution

The fourth proportional to 28,701, 39,607.38 and 16,128.18 is: 22,256.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,701 : 39,607.38 = 16,128.18 : x
  2. Step 2: Convert to fraction form
    28,701/39,607.38 = 16,128.18/x
  3. Step 3: Cross multiply
    28,701x = 39,607.38 × 16,128.18
  4. Step 4: Simplify right side
    28,701x = 638,794,953.97
  5. Step 5: Solve for x
    x = 638,794,953.97/28,701
  6. Step 6: Final answer
    x = 22,256.89

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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.