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Finding the Fourth Proportional to 6,423.20, 9,696.40 and 6,358.40

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Solution

The fourth proportional to 6,423.20, 9,696.40 and 6,358.40 is: 9,598.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,423.20 : 9,696.40 = 6,358.40 : x
  2. Step 2: Convert to fraction form
    6,423.20/9,696.40 = 6,358.40/x
  3. Step 3: Cross multiply
    6,423.20x = 9,696.40 × 6,358.40
  4. Step 4: Simplify right side
    6,423.20x = 61,653,589.76
  5. Step 5: Solve for x
    x = 61,653,589.76/6,423.20
  6. Step 6: Final answer
    x = 9,598.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.