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Finding the Fourth Proportional to 65,807.94, 98,712.67 and 18,420.21

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Solution

The fourth proportional to 65,807.94, 98,712.67 and 18,420.21 is: 27,630.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,807.94 : 98,712.67 = 18,420.21 : x
  2. Step 2: Convert to fraction form
    65,807.94/98,712.67 = 18,420.21/x
  3. Step 3: Cross multiply
    65,807.94x = 98,712.67 × 18,420.21
  4. Step 4: Simplify right side
    65,807.94x = 1,818,308,111.06
  5. Step 5: Solve for x
    x = 1,818,308,111.06/65,807.94
  6. Step 6: Final answer
    x = 27,630.53

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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.