Home / 12,919.36-19,368.10-5,123.92

Finding the Fourth Proportional to 12,919.36, 19,368.10 and 5,123.92

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Solution

The fourth proportional to 12,919.36, 19,368.10 and 5,123.92 is: 7,681.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.36 : 19,368.10 = 5,123.92 : x
  2. Step 2: Convert to fraction form
    12,919.36/19,368.10 = 5,123.92/x
  3. Step 3: Cross multiply
    12,919.36x = 19,368.10 × 5,123.92
  4. Step 4: Simplify right side
    12,919.36x = 99,240,594.95
  5. Step 5: Solve for x
    x = 99,240,594.95/12,919.36
  6. Step 6: Final answer
    x = 7,681.54

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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.