Home / 7,931.70-10,940.78-5,102.75

Finding the Fourth Proportional to 7,931.70, 10,940.78 and 5,102.75

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Solution

The fourth proportional to 7,931.70, 10,940.78 and 5,102.75 is: 7,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.70 : 10,940.78 = 5,102.75 : x
  2. Step 2: Convert to fraction form
    7,931.70/10,940.78 = 5,102.75/x
  3. Step 3: Cross multiply
    7,931.70x = 10,940.78 × 5,102.75
  4. Step 4: Simplify right side
    7,931.70x = 55,828,065.15
  5. Step 5: Solve for x
    x = 55,828,065.15/7,931.70
  6. Step 6: Final answer
    x = 7,038.60

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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.