Home / 21,801.40-32,615.70-18,911.80

Finding the Fourth Proportional to 21,801.40, 32,615.70 and 18,911.80

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Solution

The fourth proportional to 21,801.40, 32,615.70 and 18,911.80 is: 28,292.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,801.40 : 32,615.70 = 18,911.80 : x
  2. Step 2: Convert to fraction form
    21,801.40/32,615.70 = 18,911.80/x
  3. Step 3: Cross multiply
    21,801.40x = 32,615.70 × 18,911.80
  4. Step 4: Simplify right side
    21,801.40x = 616,821,595.26
  5. Step 5: Solve for x
    x = 616,821,595.26/21,801.40
  6. Step 6: Final answer
    x = 28,292.75

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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.