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Finding the Fourth Proportional to 62,580.72, 93,851.64 and 21,018

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Solution

The fourth proportional to 62,580.72, 93,851.64 and 21,018 is: 31,520.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,580.72 : 93,851.64 = 21,018 : x
  2. Step 2: Convert to fraction form
    62,580.72/93,851.64 = 21,018/x
  3. Step 3: Cross multiply
    62,580.72x = 93,851.64 × 21,018
  4. Step 4: Simplify right side
    62,580.72x = 1,972,573,769.52
  5. Step 5: Solve for x
    x = 1,972,573,769.52/62,580.72
  6. Step 6: Final answer
    x = 31,520.47

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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.