Home / 13,678.81-18,876.49-7,710.36

Finding the Fourth Proportional to 13,678.81, 18,876.49 and 7,710.36

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Solution

The fourth proportional to 13,678.81, 18,876.49 and 7,710.36 is: 10,640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.81 : 18,876.49 = 7,710.36 : x
  2. Step 2: Convert to fraction form
    13,678.81/18,876.49 = 7,710.36/x
  3. Step 3: Cross multiply
    13,678.81x = 18,876.49 × 7,710.36
  4. Step 4: Simplify right side
    13,678.81x = 145,544,443.37
  5. Step 5: Solve for x
    x = 145,544,443.37/13,678.81
  6. Step 6: Final answer
    x = 10,640.14

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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.