Home / 12,619.40-18,929.10-3,854.30

Finding the Fourth Proportional to 12,619.40, 18,929.10 and 3,854.30

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Solution

The fourth proportional to 12,619.40, 18,929.10 and 3,854.30 is: 5,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.40 : 18,929.10 = 3,854.30 : x
  2. Step 2: Convert to fraction form
    12,619.40/18,929.10 = 3,854.30/x
  3. Step 3: Cross multiply
    12,619.40x = 18,929.10 × 3,854.30
  4. Step 4: Simplify right side
    12,619.40x = 72,958,430.13
  5. Step 5: Solve for x
    x = 72,958,430.13/12,619.40
  6. Step 6: Final answer
    x = 5,781.45

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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.