Home / 9,137.79-12,611.03-5,780.75

Finding the Fourth Proportional to 9,137.79, 12,611.03 and 5,780.75

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Solution

The fourth proportional to 9,137.79, 12,611.03 and 5,780.75 is: 7,977.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,137.79 : 12,611.03 = 5,780.75 : x
  2. Step 2: Convert to fraction form
    9,137.79/12,611.03 = 5,780.75/x
  3. Step 3: Cross multiply
    9,137.79x = 12,611.03 × 5,780.75
  4. Step 4: Simplify right side
    9,137.79x = 72,901,119.71
  5. Step 5: Solve for x
    x = 72,901,119.71/9,137.79
  6. Step 6: Final answer
    x = 7,977.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.