Home / 38,700.65-53,406.31-21,704.89

Finding the Fourth Proportional to 38,700.65, 53,406.31 and 21,704.89

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Solution

The fourth proportional to 38,700.65, 53,406.31 and 21,704.89 is: 29,952.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,700.65 : 53,406.31 = 21,704.89 : x
  2. Step 2: Convert to fraction form
    38,700.65/53,406.31 = 21,704.89/x
  3. Step 3: Cross multiply
    38,700.65x = 53,406.31 × 21,704.89
  4. Step 4: Simplify right side
    38,700.65x = 1,159,177,975.33
  5. Step 5: Solve for x
    x = 1,159,177,975.33/38,700.65
  6. Step 6: Final answer
    x = 29,952.42

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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.