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Finding the Fourth Proportional to 38,571.40, 53,227.70 and 20,907.40

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Solution

The fourth proportional to 38,571.40, 53,227.70 and 20,907.40 is: 28,851.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,571.40 : 53,227.70 = 20,907.40 : x
  2. Step 2: Convert to fraction form
    38,571.40/53,227.70 = 20,907.40/x
  3. Step 3: Cross multiply
    38,571.40x = 53,227.70 × 20,907.40
  4. Step 4: Simplify right side
    38,571.40x = 1,112,852,814.98
  5. Step 5: Solve for x
    x = 1,112,852,814.98/38,571.40
  6. Step 6: Final answer
    x = 28,851.76

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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.