Home / 20,645.58-28,483.47-12,261.90

Finding the Fourth Proportional to 20,645.58, 28,483.47 and 12,261.90

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Solution

The fourth proportional to 20,645.58, 28,483.47 and 12,261.90 is: 16,917.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.58 : 28,483.47 = 12,261.90 : x
  2. Step 2: Convert to fraction form
    20,645.58/28,483.47 = 12,261.90/x
  3. Step 3: Cross multiply
    20,645.58x = 28,483.47 × 12,261.90
  4. Step 4: Simplify right side
    20,645.58x = 349,261,460.79
  5. Step 5: Solve for x
    x = 349,261,460.79/20,645.58
  6. Step 6: Final answer
    x = 16,917.01

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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.