Home / 12,399.68-17,111.40-6,810.32

Finding the Fourth Proportional to 12,399.68, 17,111.40 and 6,810.32

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Solution

The fourth proportional to 12,399.68, 17,111.40 and 6,810.32 is: 9,398.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.68 : 17,111.40 = 6,810.32 : x
  2. Step 2: Convert to fraction form
    12,399.68/17,111.40 = 6,810.32/x
  3. Step 3: Cross multiply
    12,399.68x = 17,111.40 × 6,810.32
  4. Step 4: Simplify right side
    12,399.68x = 116,534,109.65
  5. Step 5: Solve for x
    x = 116,534,109.65/12,399.68
  6. Step 6: Final answer
    x = 9,398.15

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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.