Home / 12,991.51-19,488.21-4,439.53

Finding the Fourth Proportional to 12,991.51, 19,488.21 and 4,439.53

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Solution

The fourth proportional to 12,991.51, 19,488.21 and 4,439.53 is: 6,659.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.51 : 19,488.21 = 4,439.53 : x
  2. Step 2: Convert to fraction form
    12,991.51/19,488.21 = 4,439.53/x
  3. Step 3: Cross multiply
    12,991.51x = 19,488.21 × 4,439.53
  4. Step 4: Simplify right side
    12,991.51x = 86,518,492.94
  5. Step 5: Solve for x
    x = 86,518,492.94/12,991.51
  6. Step 6: Final answer
    x = 6,659.62

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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.