Home / 12,911.80-19,367.70-10,406.20

Finding the Fourth Proportional to 12,911.80, 19,367.70 and 10,406.20

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Solution

The fourth proportional to 12,911.80, 19,367.70 and 10,406.20 is: 15,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.80 : 19,367.70 = 10,406.20 : x
  2. Step 2: Convert to fraction form
    12,911.80/19,367.70 = 10,406.20/x
  3. Step 3: Cross multiply
    12,911.80x = 19,367.70 × 10,406.20
  4. Step 4: Simplify right side
    12,911.80x = 201,544,159.74
  5. Step 5: Solve for x
    x = 201,544,159.74/12,911.80
  6. Step 6: Final answer
    x = 15,609.30

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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.