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Finding the Fourth Proportional to 7,686.15, 10,606.05 and 4,328.90

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Solution

The fourth proportional to 7,686.15, 10,606.05 and 4,328.90 is: 5,973.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.15 : 10,606.05 = 4,328.90 : x
  2. Step 2: Convert to fraction form
    7,686.15/10,606.05 = 4,328.90/x
  3. Step 3: Cross multiply
    7,686.15x = 10,606.05 × 4,328.90
  4. Step 4: Simplify right side
    7,686.15x = 45,912,529.85
  5. Step 5: Solve for x
    x = 45,912,529.85/7,686.15
  6. Step 6: Final answer
    x = 5,973.41

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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.