Home / 9,918.89-13,687.21-5,669.12

Finding the Fourth Proportional to 9,918.89, 13,687.21 and 5,669.12

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Solution

The fourth proportional to 9,918.89, 13,687.21 and 5,669.12 is: 7,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.89 : 13,687.21 = 5,669.12 : x
  2. Step 2: Convert to fraction form
    9,918.89/13,687.21 = 5,669.12/x
  3. Step 3: Cross multiply
    9,918.89x = 13,687.21 × 5,669.12
  4. Step 4: Simplify right side
    9,918.89x = 77,594,477.26
  5. Step 5: Solve for x
    x = 77,594,477.26/9,918.89
  6. Step 6: Final answer
    x = 7,822.90

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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.