Home / 20,580.12-28,400.45-11,630.52

Finding the Fourth Proportional to 20,580.12, 28,400.45 and 11,630.52

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Solution

The fourth proportional to 20,580.12, 28,400.45 and 11,630.52 is: 16,050.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.12 : 28,400.45 = 11,630.52 : x
  2. Step 2: Convert to fraction form
    20,580.12/28,400.45 = 11,630.52/x
  3. Step 3: Cross multiply
    20,580.12x = 28,400.45 × 11,630.52
  4. Step 4: Simplify right side
    20,580.12x = 330,311,943.58
  5. Step 5: Solve for x
    x = 330,311,943.58/20,580.12
  6. Step 6: Final answer
    x = 16,050.05

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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.