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Finding the Fourth Proportional to 7,208.19, 9,888.68 and 7,140.15

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Solution

The fourth proportional to 7,208.19, 9,888.68 and 7,140.15 is: 9,795.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208.19 : 9,888.68 = 7,140.15 : x
  2. Step 2: Convert to fraction form
    7,208.19/9,888.68 = 7,140.15/x
  3. Step 3: Cross multiply
    7,208.19x = 9,888.68 × 7,140.15
  4. Step 4: Simplify right side
    7,208.19x = 70,606,676.35
  5. Step 5: Solve for x
    x = 70,606,676.35/7,208.19
  6. Step 6: Final answer
    x = 9,795.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.