Home / 38,928.20-53,720.91-21,023.20

Finding the Fourth Proportional to 38,928.20, 53,720.91 and 21,023.20

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Solution

The fourth proportional to 38,928.20, 53,720.91 and 21,023.20 is: 29,012.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,928.20 : 53,720.91 = 21,023.20 : x
  2. Step 2: Convert to fraction form
    38,928.20/53,720.91 = 21,023.20/x
  3. Step 3: Cross multiply
    38,928.20x = 53,720.91 × 21,023.20
  4. Step 4: Simplify right side
    38,928.20x = 1,129,385,330.00
  5. Step 5: Solve for x
    x = 1,129,385,330.00/38,928.20
  6. Step 6: Final answer
    x = 29,012.01

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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.