Home / 7,931.74-11,897.61-3,311.50

Finding the Fourth Proportional to 7,931.74, 11,897.61 and 3,311.50

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Solution

The fourth proportional to 7,931.74, 11,897.61 and 3,311.50 is: 4,967.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.74 : 11,897.61 = 3,311.50 : x
  2. Step 2: Convert to fraction form
    7,931.74/11,897.61 = 3,311.50/x
  3. Step 3: Cross multiply
    7,931.74x = 11,897.61 × 3,311.50
  4. Step 4: Simplify right side
    7,931.74x = 39,398,935.52
  5. Step 5: Solve for x
    x = 39,398,935.52/7,931.74
  6. Step 6: Final answer
    x = 4,967.25

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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.