Home / 21,340.86-29,447.46-11,907.60

Finding the Fourth Proportional to 21,340.86, 29,447.46 and 11,907.60

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Solution

The fourth proportional to 21,340.86, 29,447.46 and 11,907.60 is: 16,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.86 : 29,447.46 = 11,907.60 : x
  2. Step 2: Convert to fraction form
    21,340.86/29,447.46 = 11,907.60/x
  3. Step 3: Cross multiply
    21,340.86x = 29,447.46 × 11,907.60
  4. Step 4: Simplify right side
    21,340.86x = 350,648,574.70
  5. Step 5: Solve for x
    x = 350,648,574.70/21,340.86
  6. Step 6: Final answer
    x = 16,430.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.