Home / 21,340.40-32,010.60-20,130.80

Finding the Fourth Proportional to 21,340.40, 32,010.60 and 20,130.80

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Solution

The fourth proportional to 21,340.40, 32,010.60 and 20,130.80 is: 30,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.40 : 32,010.60 = 20,130.80 : x
  2. Step 2: Convert to fraction form
    21,340.40/32,010.60 = 20,130.80/x
  3. Step 3: Cross multiply
    21,340.40x = 32,010.60 × 20,130.80
  4. Step 4: Simplify right side
    21,340.40x = 644,398,986.48
  5. Step 5: Solve for x
    x = 644,398,986.48/21,340.40
  6. Step 6: Final answer
    x = 30,196.20

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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.