Home / 21,933.15-30,270.33-12,980.63

Finding the Fourth Proportional to 21,933.15, 30,270.33 and 12,980.63

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Solution

The fourth proportional to 21,933.15, 30,270.33 and 12,980.63 is: 17,914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,933.15 : 30,270.33 = 12,980.63 : x
  2. Step 2: Convert to fraction form
    21,933.15/30,270.33 = 12,980.63/x
  3. Step 3: Cross multiply
    21,933.15x = 30,270.33 × 12,980.63
  4. Step 4: Simplify right side
    21,933.15x = 392,927,802.36
  5. Step 5: Solve for x
    x = 392,927,802.36/21,933.15
  6. Step 6: Final answer
    x = 17,914.79

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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.