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Finding the Fourth Proportional to 6,503.79, 8,975.91 and 3,987.58

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Solution

The fourth proportional to 6,503.79, 8,975.91 and 3,987.58 is: 5,503.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,503.79 : 8,975.91 = 3,987.58 : x
  2. Step 2: Convert to fraction form
    6,503.79/8,975.91 = 3,987.58/x
  3. Step 3: Cross multiply
    6,503.79x = 8,975.91 × 3,987.58
  4. Step 4: Simplify right side
    6,503.79x = 35,792,159.20
  5. Step 5: Solve for x
    x = 35,792,159.20/6,503.79
  6. Step 6: Final answer
    x = 5,503.28

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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.