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Finding the Fourth Proportional to 6,386.40, 9,579.60 and 6,345.45

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Solution

The fourth proportional to 6,386.40, 9,579.60 and 6,345.45 is: 9,518.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.40 : 9,579.60 = 6,345.45 : x
  2. Step 2: Convert to fraction form
    6,386.40/9,579.60 = 6,345.45/x
  3. Step 3: Cross multiply
    6,386.40x = 9,579.60 × 6,345.45
  4. Step 4: Simplify right side
    6,386.40x = 60,786,872.82
  5. Step 5: Solve for x
    x = 60,786,872.82/6,386.40
  6. Step 6: Final answer
    x = 9,518.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.