Home / 9,638.40-13,300.80-6,281.60

Finding the Fourth Proportional to 9,638.40, 13,300.80 and 6,281.60

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Solution

The fourth proportional to 9,638.40, 13,300.80 and 6,281.60 is: 8,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,638.40 : 13,300.80 = 6,281.60 : x
  2. Step 2: Convert to fraction form
    9,638.40/13,300.80 = 6,281.60/x
  3. Step 3: Cross multiply
    9,638.40x = 13,300.80 × 6,281.60
  4. Step 4: Simplify right side
    9,638.40x = 83,550,305.28
  5. Step 5: Solve for x
    x = 83,550,305.28/9,638.40
  6. Step 6: Final answer
    x = 8,668.48

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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.