Home / 21,811.68-30,100.32-11,875.68

Finding the Fourth Proportional to 21,811.68, 30,100.32 and 11,875.68

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Solution

The fourth proportional to 21,811.68, 30,100.32 and 11,875.68 is: 16,388.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.68 : 30,100.32 = 11,875.68 : x
  2. Step 2: Convert to fraction form
    21,811.68/30,100.32 = 11,875.68/x
  3. Step 3: Cross multiply
    21,811.68x = 30,100.32 × 11,875.68
  4. Step 4: Simplify right side
    21,811.68x = 357,461,768.22
  5. Step 5: Solve for x
    x = 357,461,768.22/21,811.68
  6. Step 6: Final answer
    x = 16,388.55

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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.