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Finding the Fourth Proportional to 28,096.96, 42,145.44 and 7,320.40

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Solution

The fourth proportional to 28,096.96, 42,145.44 and 7,320.40 is: 10,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,096.96 : 42,145.44 = 7,320.40 : x
  2. Step 2: Convert to fraction form
    28,096.96/42,145.44 = 7,320.40/x
  3. Step 3: Cross multiply
    28,096.96x = 42,145.44 × 7,320.40
  4. Step 4: Simplify right side
    28,096.96x = 308,521,478.98
  5. Step 5: Solve for x
    x = 308,521,478.98/28,096.96
  6. Step 6: Final answer
    x = 10,980.60

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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.