Home / 21,945.80-32,918.70-19,440.20

Finding the Fourth Proportional to 21,945.80, 32,918.70 and 19,440.20

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Solution

The fourth proportional to 21,945.80, 32,918.70 and 19,440.20 is: 29,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.80 : 32,918.70 = 19,440.20 : x
  2. Step 2: Convert to fraction form
    21,945.80/32,918.70 = 19,440.20/x
  3. Step 3: Cross multiply
    21,945.80x = 32,918.70 × 19,440.20
  4. Step 4: Simplify right side
    21,945.80x = 639,946,111.74
  5. Step 5: Solve for x
    x = 639,946,111.74/21,945.80
  6. Step 6: Final answer
    x = 29,160.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.