Home / 12,678.64-19,009.86-5,288.20

Finding the Fourth Proportional to 12,678.64, 19,009.86 and 5,288.20

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Solution

The fourth proportional to 12,678.64, 19,009.86 and 5,288.20 is: 7,928.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.64 : 19,009.86 = 5,288.20 : x
  2. Step 2: Convert to fraction form
    12,678.64/19,009.86 = 5,288.20/x
  3. Step 3: Cross multiply
    12,678.64x = 19,009.86 × 5,288.20
  4. Step 4: Simplify right side
    12,678.64x = 100,527,941.65
  5. Step 5: Solve for x
    x = 100,527,941.65/12,678.64
  6. Step 6: Final answer
    x = 7,928.92

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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.