Home / 13,879.81-19,160.40-9,645.18

Finding the Fourth Proportional to 13,879.81, 19,160.40 and 9,645.18

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Solution

The fourth proportional to 13,879.81, 19,160.40 and 9,645.18 is: 13,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.81 : 19,160.40 = 9,645.18 : x
  2. Step 2: Convert to fraction form
    13,879.81/19,160.40 = 9,645.18/x
  3. Step 3: Cross multiply
    13,879.81x = 19,160.40 × 9,645.18
  4. Step 4: Simplify right side
    13,879.81x = 184,805,506.87
  5. Step 5: Solve for x
    x = 184,805,506.87/13,879.81
  6. Step 6: Final answer
    x = 13,314.70

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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.