Home / 12,690.18-19,036.90-4,371.48

Finding the Fourth Proportional to 12,690.18, 19,036.90 and 4,371.48

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Solution

The fourth proportional to 12,690.18, 19,036.90 and 4,371.48 is: 6,557.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.18 : 19,036.90 = 4,371.48 : x
  2. Step 2: Convert to fraction form
    12,690.18/19,036.90 = 4,371.48/x
  3. Step 3: Cross multiply
    12,690.18x = 19,036.90 × 4,371.48
  4. Step 4: Simplify right side
    12,690.18x = 83,219,427.61
  5. Step 5: Solve for x
    x = 83,219,427.61/12,690.18
  6. Step 6: Final answer
    x = 6,557.78

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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.