Home / 9,775.38-13,486.49-6,420.01

Finding the Fourth Proportional to 9,775.38, 13,486.49 and 6,420.01

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Solution

The fourth proportional to 9,775.38, 13,486.49 and 6,420.01 is: 8,857.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,775.38 : 13,486.49 = 6,420.01 : x
  2. Step 2: Convert to fraction form
    9,775.38/13,486.49 = 6,420.01/x
  3. Step 3: Cross multiply
    9,775.38x = 13,486.49 × 6,420.01
  4. Step 4: Simplify right side
    9,775.38x = 86,583,409.50
  5. Step 5: Solve for x
    x = 86,583,409.50/9,775.38
  6. Step 6: Final answer
    x = 8,857.29

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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.