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Finding the Fourth Proportional to 43,368.48, 65,039.76 and 15,660

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Solution

The fourth proportional to 43,368.48, 65,039.76 and 15,660 is: 23,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,368.48 : 65,039.76 = 15,660 : x
  2. Step 2: Convert to fraction form
    43,368.48/65,039.76 = 15,660/x
  3. Step 3: Cross multiply
    43,368.48x = 65,039.76 × 15,660
  4. Step 4: Simplify right side
    43,368.48x = 1,018,522,641.60
  5. Step 5: Solve for x
    x = 1,018,522,641.60/43,368.48
  6. Step 6: Final answer
    x = 23,485.32

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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.