Home / 21,289.78-31,907.50-9,440.15

Finding the Fourth Proportional to 21,289.78, 31,907.50 and 9,440.15

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Solution

The fourth proportional to 21,289.78, 31,907.50 and 9,440.15 is: 14,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.78 : 31,907.50 = 9,440.15 : x
  2. Step 2: Convert to fraction form
    21,289.78/31,907.50 = 9,440.15/x
  3. Step 3: Cross multiply
    21,289.78x = 31,907.50 × 9,440.15
  4. Step 4: Simplify right side
    21,289.78x = 301,211,642.29
  5. Step 5: Solve for x
    x = 301,211,642.29/21,289.78
  6. Step 6: Final answer
    x = 14,148.18

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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.