Home / 11,315.86-16,970.55-3,918.40

Finding the Fourth Proportional to 11,315.86, 16,970.55 and 3,918.40

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Solution

The fourth proportional to 11,315.86, 16,970.55 and 3,918.40 is: 5,876.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.86 : 16,970.55 = 3,918.40 : x
  2. Step 2: Convert to fraction form
    11,315.86/16,970.55 = 3,918.40/x
  3. Step 3: Cross multiply
    11,315.86x = 16,970.55 × 3,918.40
  4. Step 4: Simplify right side
    11,315.86x = 66,497,403.12
  5. Step 5: Solve for x
    x = 66,497,403.12/11,315.86
  6. Step 6: Final answer
    x = 5,876.48

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1.5x scale

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.