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Finding the Fourth Proportional to 43,590, 65,394.72 and 15,888

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Solution

The fourth proportional to 43,590, 65,394.72 and 15,888 is: 23,835.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,590 : 65,394.72 = 15,888 : x
  2. Step 2: Convert to fraction form
    43,590/65,394.72 = 15,888/x
  3. Step 3: Cross multiply
    43,590x = 65,394.72 × 15,888
  4. Step 4: Simplify right side
    43,590x = 1,038,991,311.36
  5. Step 5: Solve for x
    x = 1,038,991,311.36/43,590
  6. Step 6: Final answer
    x = 23,835.54

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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.