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Finding the Fourth Proportional to 7,672.90, 11,509.44 and 2,478.76

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Solution

The fourth proportional to 7,672.90, 11,509.44 and 2,478.76 is: 3,718.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.90 : 11,509.44 = 2,478.76 : x
  2. Step 2: Convert to fraction form
    7,672.90/11,509.44 = 2,478.76/x
  3. Step 3: Cross multiply
    7,672.90x = 11,509.44 × 2,478.76
  4. Step 4: Simplify right side
    7,672.90x = 28,529,139.49
  5. Step 5: Solve for x
    x = 28,529,139.49/7,672.90
  6. Step 6: Final answer
    x = 3,718.17

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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.