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Finding the Fourth Proportional to 7,890.97, 10,889.53 and 5,058.34

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Solution

The fourth proportional to 7,890.97, 10,889.53 and 5,058.34 is: 6,980.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.97 : 10,889.53 = 5,058.34 : x
  2. Step 2: Convert to fraction form
    7,890.97/10,889.53 = 5,058.34/x
  3. Step 3: Cross multiply
    7,890.97x = 10,889.53 × 5,058.34
  4. Step 4: Simplify right side
    7,890.97x = 55,082,985.05
  5. Step 5: Solve for x
    x = 55,082,985.05/7,890.97
  6. Step 6: Final answer
    x = 6,980.51

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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.