Home / 21,638.56-32,457.84-19,720.48

Finding the Fourth Proportional to 21,638.56, 32,457.84 and 19,720.48

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Solution

The fourth proportional to 21,638.56, 32,457.84 and 19,720.48 is: 29,580.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.56 : 32,457.84 = 19,720.48 : x
  2. Step 2: Convert to fraction form
    21,638.56/32,457.84 = 19,720.48/x
  3. Step 3: Cross multiply
    21,638.56x = 32,457.84 × 19,720.48
  4. Step 4: Simplify right side
    21,638.56x = 640,084,184.56
  5. Step 5: Solve for x
    x = 640,084,184.56/21,638.56
  6. Step 6: Final answer
    x = 29,580.72

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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.