Home / 18,689.20-28,030.60-6,996.40

Finding the Fourth Proportional to 18,689.20, 28,030.60 and 6,996.40

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Solution

The fourth proportional to 18,689.20, 28,030.60 and 6,996.40 is: 10,493.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.20 : 28,030.60 = 6,996.40 : x
  2. Step 2: Convert to fraction form
    18,689.20/28,030.60 = 6,996.40/x
  3. Step 3: Cross multiply
    18,689.20x = 28,030.60 × 6,996.40
  4. Step 4: Simplify right side
    18,689.20x = 196,113,289.84
  5. Step 5: Solve for x
    x = 196,113,289.84/18,689.20
  6. Step 6: Final answer
    x = 10,493.40

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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.