Home / 20,622.08-28,485.60-15,812.84

Finding the Fourth Proportional to 20,622.08, 28,485.60 and 15,812.84

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Solution

The fourth proportional to 20,622.08, 28,485.60 and 15,812.84 is: 21,842.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.08 : 28,485.60 = 15,812.84 : x
  2. Step 2: Convert to fraction form
    20,622.08/28,485.60 = 15,812.84/x
  3. Step 3: Cross multiply
    20,622.08x = 28,485.60 × 15,812.84
  4. Step 4: Simplify right side
    20,622.08x = 450,438,235.10
  5. Step 5: Solve for x
    x = 450,438,235.10/20,622.08
  6. Step 6: Final answer
    x = 21,842.52

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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.