Home / 20,739.85-28,623.77-13,186.93

Finding the Fourth Proportional to 20,739.85, 28,623.77 and 13,186.93

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Solution

The fourth proportional to 20,739.85, 28,623.77 and 13,186.93 is: 18,199.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.85 : 28,623.77 = 13,186.93 : x
  2. Step 2: Convert to fraction form
    20,739.85/28,623.77 = 13,186.93/x
  3. Step 3: Cross multiply
    20,739.85x = 28,623.77 × 13,186.93
  4. Step 4: Simplify right side
    20,739.85x = 377,459,541.17
  5. Step 5: Solve for x
    x = 377,459,541.17/20,739.85
  6. Step 6: Final answer
    x = 18,199.73

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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.