Home / 12,771.04-19,139.93-7,148.47

Finding the Fourth Proportional to 12,771.04, 19,139.93 and 7,148.47

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Solution

The fourth proportional to 12,771.04, 19,139.93 and 7,148.47 is: 10,713.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,771.04 : 19,139.93 = 7,148.47 : x
  2. Step 2: Convert to fraction form
    12,771.04/19,139.93 = 7,148.47/x
  3. Step 3: Cross multiply
    12,771.04x = 19,139.93 × 7,148.47
  4. Step 4: Simplify right side
    12,771.04x = 136,821,215.41
  5. Step 5: Solve for x
    x = 136,821,215.41/12,771.04
  6. Step 6: Final answer
    x = 10,713.40

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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.