Home / 20,622.48-28,459.80-11,670.36

Finding the Fourth Proportional to 20,622.48, 28,459.80 and 11,670.36

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Solution

The fourth proportional to 20,622.48, 28,459.80 and 11,670.36 is: 16,105.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.48 : 28,459.80 = 11,670.36 : x
  2. Step 2: Convert to fraction form
    20,622.48/28,459.80 = 11,670.36/x
  3. Step 3: Cross multiply
    20,622.48x = 28,459.80 × 11,670.36
  4. Step 4: Simplify right side
    20,622.48x = 332,136,111.53
  5. Step 5: Solve for x
    x = 332,136,111.53/20,622.48
  6. Step 6: Final answer
    x = 16,105.54

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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.