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Finding the Fourth Proportional to 18,703.80, 28,056.96 and 7,610.40

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Solution

The fourth proportional to 18,703.80, 28,056.96 and 7,610.40 is: 11,416.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.80 : 28,056.96 = 7,610.40 : x
  2. Step 2: Convert to fraction form
    18,703.80/28,056.96 = 7,610.40/x
  3. Step 3: Cross multiply
    18,703.80x = 28,056.96 × 7,610.40
  4. Step 4: Simplify right side
    18,703.80x = 213,524,688.38
  5. Step 5: Solve for x
    x = 213,524,688.38/18,703.80
  6. Step 6: Final answer
    x = 11,416.11

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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.