Home / 28,316.86-39,078.27-15,571.01

Finding the Fourth Proportional to 28,316.86, 39,078.27 and 15,571.01

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Solution

The fourth proportional to 28,316.86, 39,078.27 and 15,571.01 is: 21,488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.86 : 39,078.27 = 15,571.01 : x
  2. Step 2: Convert to fraction form
    28,316.86/39,078.27 = 15,571.01/x
  3. Step 3: Cross multiply
    28,316.86x = 39,078.27 × 15,571.01
  4. Step 4: Simplify right side
    28,316.86x = 608,488,181.80
  5. Step 5: Solve for x
    x = 608,488,181.80/28,316.86
  6. Step 6: Final answer
    x = 21,488.55

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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.