Home / 20,648.40-28,493.73-11,216.94

Finding the Fourth Proportional to 20,648.40, 28,493.73 and 11,216.94

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Solution

The fourth proportional to 20,648.40, 28,493.73 and 11,216.94 is: 15,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.40 : 28,493.73 = 11,216.94 : x
  2. Step 2: Convert to fraction form
    20,648.40/28,493.73 = 11,216.94/x
  3. Step 3: Cross multiply
    20,648.40x = 28,493.73 × 11,216.94
  4. Step 4: Simplify right side
    20,648.40x = 319,612,459.79
  5. Step 5: Solve for x
    x = 319,612,459.79/20,648.40
  6. Step 6: Final answer
    x = 15,478.80

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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.