Home / 15,485.79-21,370.62-8,771.25

Finding the Fourth Proportional to 15,485.79, 21,370.62 and 8,771.25

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Solution

The fourth proportional to 15,485.79, 21,370.62 and 8,771.25 is: 12,104.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.79 : 21,370.62 = 8,771.25 : x
  2. Step 2: Convert to fraction form
    15,485.79/21,370.62 = 8,771.25/x
  3. Step 3: Cross multiply
    15,485.79x = 21,370.62 × 8,771.25
  4. Step 4: Simplify right side
    15,485.79x = 187,447,050.68
  5. Step 5: Solve for x
    x = 187,447,050.68/15,485.79
  6. Step 6: Final answer
    x = 12,104.46

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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.