Home / 20,415.51-30,615.36-7,933.88

Finding the Fourth Proportional to 20,415.51, 30,615.36 and 7,933.88

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Solution

The fourth proportional to 20,415.51, 30,615.36 and 7,933.88 is: 11,897.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.51 : 30,615.36 = 7,933.88 : x
  2. Step 2: Convert to fraction form
    20,415.51/30,615.36 = 7,933.88/x
  3. Step 3: Cross multiply
    20,415.51x = 30,615.36 × 7,933.88
  4. Step 4: Simplify right side
    20,415.51x = 242,898,592.40
  5. Step 5: Solve for x
    x = 242,898,592.40/20,415.51
  6. Step 6: Final answer
    x = 11,897.75

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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.