Home / 39,678.23-54,755.84-21,528.88

Finding the Fourth Proportional to 39,678.23, 54,755.84 and 21,528.88

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Solution

The fourth proportional to 39,678.23, 54,755.84 and 21,528.88 is: 29,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.23 : 54,755.84 = 21,528.88 : x
  2. Step 2: Convert to fraction form
    39,678.23/54,755.84 = 21,528.88/x
  3. Step 3: Cross multiply
    39,678.23x = 54,755.84 × 21,528.88
  4. Step 4: Simplify right side
    39,678.23x = 1,178,831,825.59
  5. Step 5: Solve for x
    x = 1,178,831,825.59/39,678.23
  6. Step 6: Final answer
    x = 29,709.79

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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.