Home / 12,938.87-19,412.40-4,618.70

Finding the Fourth Proportional to 12,938.87, 19,412.40 and 4,618.70

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Solution

The fourth proportional to 12,938.87, 19,412.40 and 4,618.70 is: 6,929.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.87 : 19,412.40 = 4,618.70 : x
  2. Step 2: Convert to fraction form
    12,938.87/19,412.40 = 4,618.70/x
  3. Step 3: Cross multiply
    12,938.87x = 19,412.40 × 4,618.70
  4. Step 4: Simplify right side
    12,938.87x = 89,660,100.41
  5. Step 5: Solve for x
    x = 89,660,100.41/12,938.87
  6. Step 6: Final answer
    x = 6,929.52

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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.