Home / 21,720.02-32,561.51-20,686.64

Finding the Fourth Proportional to 21,720.02, 32,561.51 and 20,686.64

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Solution

The fourth proportional to 21,720.02, 32,561.51 and 20,686.64 is: 31,012.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.02 : 32,561.51 = 20,686.64 : x
  2. Step 2: Convert to fraction form
    21,720.02/32,561.51 = 20,686.64/x
  3. Step 3: Cross multiply
    21,720.02x = 32,561.51 × 20,686.64
  4. Step 4: Simplify right side
    21,720.02x = 673,587,968.99
  5. Step 5: Solve for x
    x = 673,587,968.99/21,720.02
  6. Step 6: Final answer
    x = 31,012.32

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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.