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Finding the Fourth Proportional to 30,486.96, 45,734.72 and 9,428.72

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Solution

The fourth proportional to 30,486.96, 45,734.72 and 9,428.72 is: 14,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.96 : 45,734.72 = 9,428.72 : x
  2. Step 2: Convert to fraction form
    30,486.96/45,734.72 = 9,428.72/x
  3. Step 3: Cross multiply
    30,486.96x = 45,734.72 × 9,428.72
  4. Step 4: Simplify right side
    30,486.96x = 431,219,869.16
  5. Step 5: Solve for x
    x = 431,219,869.16/30,486.96
  6. Step 6: Final answer
    x = 14,144.40

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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.