Home / 38,634.84-53,315.35-21,405.57

Finding the Fourth Proportional to 38,634.84, 53,315.35 and 21,405.57

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Solution

The fourth proportional to 38,634.84, 53,315.35 and 21,405.57 is: 29,539.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,634.84 : 53,315.35 = 21,405.57 : x
  2. Step 2: Convert to fraction form
    38,634.84/53,315.35 = 21,405.57/x
  3. Step 3: Cross multiply
    38,634.84x = 53,315.35 × 21,405.57
  4. Step 4: Simplify right side
    38,634.84x = 1,141,245,203.05
  5. Step 5: Solve for x
    x = 1,141,245,203.05/38,634.84
  6. Step 6: Final answer
    x = 29,539.28

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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.