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Finding the Fourth Proportional to 7,130.70, 10,696.05 and 1,865.70

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Solution

The fourth proportional to 7,130.70, 10,696.05 and 1,865.70 is: 2,798.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.70 : 10,696.05 = 1,865.70 : x
  2. Step 2: Convert to fraction form
    7,130.70/10,696.05 = 1,865.70/x
  3. Step 3: Cross multiply
    7,130.70x = 10,696.05 × 1,865.70
  4. Step 4: Simplify right side
    7,130.70x = 19,955,620.49
  5. Step 5: Solve for x
    x = 19,955,620.49/7,130.70
  6. Step 6: Final answer
    x = 2,798.55

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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.