Home / 12,690.50-19,036.65-3,924.28

Finding the Fourth Proportional to 12,690.50, 19,036.65 and 3,924.28

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Solution

The fourth proportional to 12,690.50, 19,036.65 and 3,924.28 is: 5,886.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.50 : 19,036.65 = 3,924.28 : x
  2. Step 2: Convert to fraction form
    12,690.50/19,036.65 = 3,924.28/x
  3. Step 3: Cross multiply
    12,690.50x = 19,036.65 × 3,924.28
  4. Step 4: Simplify right side
    12,690.50x = 74,705,144.86
  5. Step 5: Solve for x
    x = 74,705,144.86/12,690.50
  6. Step 6: Final answer
    x = 5,886.70

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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.