Home / 20,989.47-28,967.51-15,675.06

Finding the Fourth Proportional to 20,989.47, 28,967.51 and 15,675.06

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Solution

The fourth proportional to 20,989.47, 28,967.51 and 15,675.06 is: 21,633.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.47 : 28,967.51 = 15,675.06 : x
  2. Step 2: Convert to fraction form
    20,989.47/28,967.51 = 15,675.06/x
  3. Step 3: Cross multiply
    20,989.47x = 28,967.51 × 15,675.06
  4. Step 4: Simplify right side
    20,989.47x = 454,067,457.30
  5. Step 5: Solve for x
    x = 454,067,457.30/20,989.47
  6. Step 6: Final answer
    x = 21,633.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.