Home / 20,461.15-28,226.85-13,290.58

Finding the Fourth Proportional to 20,461.15, 28,226.85 and 13,290.58

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Solution

The fourth proportional to 20,461.15, 28,226.85 and 13,290.58 is: 18,334.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,461.15 : 28,226.85 = 13,290.58 : x
  2. Step 2: Convert to fraction form
    20,461.15/28,226.85 = 13,290.58/x
  3. Step 3: Cross multiply
    20,461.15x = 28,226.85 × 13,290.58
  4. Step 4: Simplify right side
    20,461.15x = 375,151,208.07
  5. Step 5: Solve for x
    x = 375,151,208.07/20,461.15
  6. Step 6: Final answer
    x = 18,334.81

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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.