Home / 12,868.29-19,288.13-5,478.93

Finding the Fourth Proportional to 12,868.29, 19,288.13 and 5,478.93

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Solution

The fourth proportional to 12,868.29, 19,288.13 and 5,478.93 is: 8,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.29 : 19,288.13 = 5,478.93 : x
  2. Step 2: Convert to fraction form
    12,868.29/19,288.13 = 5,478.93/x
  3. Step 3: Cross multiply
    12,868.29x = 19,288.13 × 5,478.93
  4. Step 4: Simplify right side
    12,868.29x = 105,678,286.71
  5. Step 5: Solve for x
    x = 105,678,286.71/12,868.29
  6. Step 6: Final answer
    x = 8,212.30

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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.