Home / 6,636.40-9,165.18-5,389.78

Finding the Fourth Proportional to 6,636.40, 9,165.18 and 5,389.78

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Solution

The fourth proportional to 6,636.40, 9,165.18 and 5,389.78 is: 7,443.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,636.40 : 9,165.18 = 5,389.78 : x
  2. Step 2: Convert to fraction form
    6,636.40/9,165.18 = 5,389.78/x
  3. Step 3: Cross multiply
    6,636.40x = 9,165.18 × 5,389.78
  4. Step 4: Simplify right side
    6,636.40x = 49,398,303.86
  5. Step 5: Solve for x
    x = 49,398,303.86/6,636.40
  6. Step 6: Final answer
    x = 7,443.54

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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.