Home / 38,681.20-58,021.80-21,185.20

Finding the Fourth Proportional to 38,681.20, 58,021.80 and 21,185.20

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Solution

The fourth proportional to 38,681.20, 58,021.80 and 21,185.20 is: 31,777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,681.20 : 58,021.80 = 21,185.20 : x
  2. Step 2: Convert to fraction form
    38,681.20/58,021.80 = 21,185.20/x
  3. Step 3: Cross multiply
    38,681.20x = 58,021.80 × 21,185.20
  4. Step 4: Simplify right side
    38,681.20x = 1,229,203,437.36
  5. Step 5: Solve for x
    x = 1,229,203,437.36/38,681.20
  6. Step 6: Final answer
    x = 31,777.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.