Home / 15,403.13-21,255.09-8,686.61

Finding the Fourth Proportional to 15,403.13, 21,255.09 and 8,686.61

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Solution

The fourth proportional to 15,403.13, 21,255.09 and 8,686.61 is: 11,986.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.13 : 21,255.09 = 8,686.61 : x
  2. Step 2: Convert to fraction form
    15,403.13/21,255.09 = 8,686.61/x
  3. Step 3: Cross multiply
    15,403.13x = 21,255.09 × 8,686.61
  4. Step 4: Simplify right side
    15,403.13x = 184,634,571.07
  5. Step 5: Solve for x
    x = 184,634,571.07/15,403.13
  6. Step 6: Final answer
    x = 11,986.83

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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.