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Finding the Fourth Proportional to 28,316.40, 42,474.45 and 7,256.40

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Solution

The fourth proportional to 28,316.40, 42,474.45 and 7,256.40 is: 10,884.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.40 : 42,474.45 = 7,256.40 : x
  2. Step 2: Convert to fraction form
    28,316.40/42,474.45 = 7,256.40/x
  3. Step 3: Cross multiply
    28,316.40x = 42,474.45 × 7,256.40
  4. Step 4: Simplify right side
    28,316.40x = 308,211,598.98
  5. Step 5: Solve for x
    x = 308,211,598.98/28,316.40
  6. Step 6: Final answer
    x = 10,884.56

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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.