Home / 12,911.29-19,342.26-8,730.81

Finding the Fourth Proportional to 12,911.29, 19,342.26 and 8,730.81

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Solution

The fourth proportional to 12,911.29, 19,342.26 and 8,730.81 is: 13,079.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.29 : 19,342.26 = 8,730.81 : x
  2. Step 2: Convert to fraction form
    12,911.29/19,342.26 = 8,730.81/x
  3. Step 3: Cross multiply
    12,911.29x = 19,342.26 × 8,730.81
  4. Step 4: Simplify right side
    12,911.29x = 168,873,597.03
  5. Step 5: Solve for x
    x = 168,873,597.03/12,911.29
  6. Step 6: Final answer
    x = 13,079.53

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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.