Home / 18,905.43-28,359.45-6,420.36

Finding the Fourth Proportional to 18,905.43, 28,359.45 and 6,420.36

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Solution

The fourth proportional to 18,905.43, 28,359.45 and 6,420.36 is: 9,630.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.43 : 28,359.45 = 6,420.36 : x
  2. Step 2: Convert to fraction form
    18,905.43/28,359.45 = 6,420.36/x
  3. Step 3: Cross multiply
    18,905.43x = 28,359.45 × 6,420.36
  4. Step 4: Simplify right side
    18,905.43x = 182,077,878.40
  5. Step 5: Solve for x
    x = 182,077,878.40/18,905.43
  6. Step 6: Final answer
    x = 9,630.98

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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.