Home / 7,875.56-11,815.45-2,945.70

Finding the Fourth Proportional to 7,875.56, 11,815.45 and 2,945.70

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Solution

The fourth proportional to 7,875.56, 11,815.45 and 2,945.70 is: 4,419.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.56 : 11,815.45 = 2,945.70 : x
  2. Step 2: Convert to fraction form
    7,875.56/11,815.45 = 2,945.70/x
  3. Step 3: Cross multiply
    7,875.56x = 11,815.45 × 2,945.70
  4. Step 4: Simplify right side
    7,875.56x = 34,804,763.70
  5. Step 5: Solve for x
    x = 34,804,763.70/7,875.56
  6. Step 6: Final answer
    x = 4,419.34

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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.