Home / 6,619.78-9,929.61-1,689.35

Finding the Fourth Proportional to 6,619.78, 9,929.61 and 1,689.35

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Solution

The fourth proportional to 6,619.78, 9,929.61 and 1,689.35 is: 2,534.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,619.78 : 9,929.61 = 1,689.35 : x
  2. Step 2: Convert to fraction form
    6,619.78/9,929.61 = 1,689.35/x
  3. Step 3: Cross multiply
    6,619.78x = 9,929.61 × 1,689.35
  4. Step 4: Simplify right side
    6,619.78x = 16,774,592.86
  5. Step 5: Solve for x
    x = 16,774,592.86/6,619.78
  6. Step 6: Final answer
    x = 2,534.01

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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.