Home / 20,492.19-28,280.57-15,447.51

Finding the Fourth Proportional to 20,492.19, 28,280.57 and 15,447.51

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Solution

The fourth proportional to 20,492.19, 28,280.57 and 15,447.51 is: 21,318.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.19 : 28,280.57 = 15,447.51 : x
  2. Step 2: Convert to fraction form
    20,492.19/28,280.57 = 15,447.51/x
  3. Step 3: Cross multiply
    20,492.19x = 28,280.57 × 15,447.51
  4. Step 4: Simplify right side
    20,492.19x = 436,864,387.88
  5. Step 5: Solve for x
    x = 436,864,387.88/20,492.19
  6. Step 6: Final answer
    x = 21,318.58

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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.