Home / 39,409.58-54,386.52-21,505.56

Finding the Fourth Proportional to 39,409.58, 54,386.52 and 21,505.56

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Solution

The fourth proportional to 39,409.58, 54,386.52 and 21,505.56 is: 29,678.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,409.58 : 54,386.52 = 21,505.56 : x
  2. Step 2: Convert to fraction form
    39,409.58/54,386.52 = 21,505.56/x
  3. Step 3: Cross multiply
    39,409.58x = 54,386.52 × 21,505.56
  4. Step 4: Simplify right side
    39,409.58x = 1,169,612,569.05
  5. Step 5: Solve for x
    x = 1,169,612,569.05/39,409.58
  6. Step 6: Final answer
    x = 29,678.39

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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.