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Finding the Fourth Proportional to 10,350.99, 15,478.79 and 7,687.61

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Solution

The fourth proportional to 10,350.99, 15,478.79 and 7,687.61 is: 11,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,350.99 : 15,478.79 = 7,687.61 : x
  2. Step 2: Convert to fraction form
    10,350.99/15,478.79 = 7,687.61/x
  3. Step 3: Cross multiply
    10,350.99x = 15,478.79 × 7,687.61
  4. Step 4: Simplify right side
    10,350.99x = 118,994,784.96
  5. Step 5: Solve for x
    x = 118,994,784.96/10,350.99
  6. Step 6: Final answer
    x = 11,495.98

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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.