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Finding the Fourth Proportional to 7,018.80, 9,695.40 and 5,709.12

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Solution

The fourth proportional to 7,018.80, 9,695.40 and 5,709.12 is: 7,886.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,018.80 : 9,695.40 = 5,709.12 : x
  2. Step 2: Convert to fraction form
    7,018.80/9,695.40 = 5,709.12/x
  3. Step 3: Cross multiply
    7,018.80x = 9,695.40 × 5,709.12
  4. Step 4: Simplify right side
    7,018.80x = 55,352,202.05
  5. Step 5: Solve for x
    x = 55,352,202.05/7,018.80
  6. Step 6: Final answer
    x = 7,886.28

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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.