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Finding the Fourth Proportional to 6,722.40, 9,276.48 and 4,070.40

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Solution

The fourth proportional to 6,722.40, 9,276.48 and 4,070.40 is: 5,616.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,722.40 : 9,276.48 = 4,070.40 : x
  2. Step 2: Convert to fraction form
    6,722.40/9,276.48 = 4,070.40/x
  3. Step 3: Cross multiply
    6,722.40x = 9,276.48 × 4,070.40
  4. Step 4: Simplify right side
    6,722.40x = 37,758,984.19
  5. Step 5: Solve for x
    x = 37,758,984.19/6,722.40
  6. Step 6: Final answer
    x = 5,616.89

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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.