Home / 11,510.27-15,889.52-8,678.79

Finding the Fourth Proportional to 11,510.27, 15,889.52 and 8,678.79

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Solution

The fourth proportional to 11,510.27, 15,889.52 and 8,678.79 is: 11,980.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,510.27 : 15,889.52 = 8,678.79 : x
  2. Step 2: Convert to fraction form
    11,510.27/15,889.52 = 8,678.79/x
  3. Step 3: Cross multiply
    11,510.27x = 15,889.52 × 8,678.79
  4. Step 4: Simplify right side
    11,510.27x = 137,901,807.28
  5. Step 5: Solve for x
    x = 137,901,807.28/11,510.27
  6. Step 6: Final answer
    x = 11,980.76

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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.