Home / 7,785.81-11,671.70-5,287.85

Finding the Fourth Proportional to 7,785.81, 11,671.70 and 5,287.85

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Solution

The fourth proportional to 7,785.81, 11,671.70 and 5,287.85 is: 7,927.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,785.81 : 11,671.70 = 5,287.85 : x
  2. Step 2: Convert to fraction form
    7,785.81/11,671.70 = 5,287.85/x
  3. Step 3: Cross multiply
    7,785.81x = 11,671.70 × 5,287.85
  4. Step 4: Simplify right side
    7,785.81x = 61,718,114.05
  5. Step 5: Solve for x
    x = 61,718,114.05/7,785.81
  6. Step 6: Final answer
    x = 7,927.00

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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.