Home / 28,645.86-42,970.85-11,989.13

Finding the Fourth Proportional to 28,645.86, 42,970.85 and 11,989.13

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Solution

The fourth proportional to 28,645.86, 42,970.85 and 11,989.13 is: 17,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,645.86 : 42,970.85 = 11,989.13 : x
  2. Step 2: Convert to fraction form
    28,645.86/42,970.85 = 11,989.13/x
  3. Step 3: Cross multiply
    28,645.86x = 42,970.85 × 11,989.13
  4. Step 4: Simplify right side
    28,645.86x = 515,183,106.86
  5. Step 5: Solve for x
    x = 515,183,106.86/28,645.86
  6. Step 6: Final answer
    x = 17,984.56

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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.