Home / 7,677.36-11,515.98-2,130.78

Finding the Fourth Proportional to 7,677.36, 11,515.98 and 2,130.78

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Solution

The fourth proportional to 7,677.36, 11,515.98 and 2,130.78 is: 3,196.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,677.36 : 11,515.98 = 2,130.78 : x
  2. Step 2: Convert to fraction form
    7,677.36/11,515.98 = 2,130.78/x
  3. Step 3: Cross multiply
    7,677.36x = 11,515.98 × 2,130.78
  4. Step 4: Simplify right side
    7,677.36x = 24,538,019.86
  5. Step 5: Solve for x
    x = 24,538,019.86/7,677.36
  6. Step 6: Final answer
    x = 3,196.15

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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.