Home / 12,678.36-19,007.28-5,288.34

Finding the Fourth Proportional to 12,678.36, 19,007.28 and 5,288.34

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Solution

The fourth proportional to 12,678.36, 19,007.28 and 5,288.34 is: 7,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.36 : 19,007.28 = 5,288.34 : x
  2. Step 2: Convert to fraction form
    12,678.36/19,007.28 = 5,288.34/x
  3. Step 3: Cross multiply
    12,678.36x = 19,007.28 × 5,288.34
  4. Step 4: Simplify right side
    12,678.36x = 100,516,959.12
  5. Step 5: Solve for x
    x = 100,516,959.12/12,678.36
  6. Step 6: Final answer
    x = 7,928.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.