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Finding the Fourth Proportional to 6,485.58, 8,946.90 and 4,128.48

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Solution

The fourth proportional to 6,485.58, 8,946.90 and 4,128.48 is: 5,695.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,485.58 : 8,946.90 = 4,128.48 : x
  2. Step 2: Convert to fraction form
    6,485.58/8,946.90 = 4,128.48/x
  3. Step 3: Cross multiply
    6,485.58x = 8,946.90 × 4,128.48
  4. Step 4: Simplify right side
    6,485.58x = 36,937,097.71
  5. Step 5: Solve for x
    x = 36,937,097.71/6,485.58
  6. Step 6: Final answer
    x = 5,695.27

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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.