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Finding the Fourth Proportional to 30,453.79, 45,685.61 and 9,388.90

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Solution

The fourth proportional to 30,453.79, 45,685.61 and 9,388.90 is: 14,084.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,453.79 : 45,685.61 = 9,388.90 : x
  2. Step 2: Convert to fraction form
    30,453.79/45,685.61 = 9,388.90/x
  3. Step 3: Cross multiply
    30,453.79x = 45,685.61 × 9,388.90
  4. Step 4: Simplify right side
    30,453.79x = 428,937,462.57
  5. Step 5: Solve for x
    x = 428,937,462.57/30,453.79
  6. Step 6: Final answer
    x = 14,084.86

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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.