Home / 20,622.12-28,428.64-15,236.63

Finding the Fourth Proportional to 20,622.12, 28,428.64 and 15,236.63

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Solution

The fourth proportional to 20,622.12, 28,428.64 and 15,236.63 is: 21,004.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.12 : 28,428.64 = 15,236.63 : x
  2. Step 2: Convert to fraction form
    20,622.12/28,428.64 = 15,236.63/x
  3. Step 3: Cross multiply
    20,622.12x = 28,428.64 × 15,236.63
  4. Step 4: Simplify right side
    20,622.12x = 433,156,669.08
  5. Step 5: Solve for x
    x = 433,156,669.08/20,622.12
  6. Step 6: Final answer
    x = 21,004.47

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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.