Home / 6,439.90-8,886.46-3,645.40

Finding the Fourth Proportional to 6,439.90, 8,886.46 and 3,645.40

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Solution

The fourth proportional to 6,439.90, 8,886.46 and 3,645.40 is: 5,030.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.90 : 8,886.46 = 3,645.40 : x
  2. Step 2: Convert to fraction form
    6,439.90/8,886.46 = 3,645.40/x
  3. Step 3: Cross multiply
    6,439.90x = 8,886.46 × 3,645.40
  4. Step 4: Simplify right side
    6,439.90x = 32,394,701.28
  5. Step 5: Solve for x
    x = 32,394,701.28/6,439.90
  6. Step 6: Final answer
    x = 5,030.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.