Home / 12,686.76-19,019.88-5,296.86

Finding the Fourth Proportional to 12,686.76, 19,019.88 and 5,296.86

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Solution

The fourth proportional to 12,686.76, 19,019.88 and 5,296.86 is: 7,941.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.76 : 19,019.88 = 5,296.86 : x
  2. Step 2: Convert to fraction form
    12,686.76/19,019.88 = 5,296.86/x
  3. Step 3: Cross multiply
    12,686.76x = 19,019.88 × 5,296.86
  4. Step 4: Simplify right side
    12,686.76x = 100,745,641.58
  5. Step 5: Solve for x
    x = 100,745,641.58/12,686.76
  6. Step 6: Final answer
    x = 7,941.01

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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.