Home / 15,399.05-21,250.38-8,684.55

Finding the Fourth Proportional to 15,399.05, 21,250.38 and 8,684.55

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Solution

The fourth proportional to 15,399.05, 21,250.38 and 8,684.55 is: 11,984.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.05 : 21,250.38 = 8,684.55 : x
  2. Step 2: Convert to fraction form
    15,399.05/21,250.38 = 8,684.55/x
  3. Step 3: Cross multiply
    15,399.05x = 21,250.38 × 8,684.55
  4. Step 4: Simplify right side
    15,399.05x = 184,549,987.63
  5. Step 5: Solve for x
    x = 184,549,987.63/15,399.05
  6. Step 6: Final answer
    x = 11,984.50

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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.