Home / 12,811.30-19,218.93-5,415.10

Finding the Fourth Proportional to 12,811.30, 19,218.93 and 5,415.10

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Solution

The fourth proportional to 12,811.30, 19,218.93 and 5,415.10 is: 8,123.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.30 : 19,218.93 = 5,415.10 : x
  2. Step 2: Convert to fraction form
    12,811.30/19,218.93 = 5,415.10/x
  3. Step 3: Cross multiply
    12,811.30x = 19,218.93 × 5,415.10
  4. Step 4: Simplify right side
    12,811.30x = 104,072,427.84
  5. Step 5: Solve for x
    x = 104,072,427.84/12,811.30
  6. Step 6: Final answer
    x = 8,123.49

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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.