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Finding the Fourth Proportional to 28,364.96, 42,548.40 and 9,898.40

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Solution

The fourth proportional to 28,364.96, 42,548.40 and 9,898.40 is: 14,847.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.96 : 42,548.40 = 9,898.40 : x
  2. Step 2: Convert to fraction form
    28,364.96/42,548.40 = 9,898.40/x
  3. Step 3: Cross multiply
    28,364.96x = 42,548.40 × 9,898.40
  4. Step 4: Simplify right side
    28,364.96x = 421,161,082.56
  5. Step 5: Solve for x
    x = 421,161,082.56/28,364.96
  6. Step 6: Final answer
    x = 14,847.94

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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.