Home / 12,890.76-19,332.28-4,123.32

Finding the Fourth Proportional to 12,890.76, 19,332.28 and 4,123.32

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Solution

The fourth proportional to 12,890.76, 19,332.28 and 4,123.32 is: 6,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.76 : 19,332.28 = 4,123.32 : x
  2. Step 2: Convert to fraction form
    12,890.76/19,332.28 = 4,123.32/x
  3. Step 3: Cross multiply
    12,890.76x = 19,332.28 × 4,123.32
  4. Step 4: Simplify right side
    12,890.76x = 79,713,176.77
  5. Step 5: Solve for x
    x = 79,713,176.77/12,890.76
  6. Step 6: Final answer
    x = 6,183.75

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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.