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Finding the Fourth Proportional to 30,503.79, 45,757.06 and 13,405.55

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Solution

The fourth proportional to 30,503.79, 45,757.06 and 13,405.55 is: 20,108.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,503.79 : 45,757.06 = 13,405.55 : x
  2. Step 2: Convert to fraction form
    30,503.79/45,757.06 = 13,405.55/x
  3. Step 3: Cross multiply
    30,503.79x = 45,757.06 × 13,405.55
  4. Step 4: Simplify right side
    30,503.79x = 613,398,293.38
  5. Step 5: Solve for x
    x = 613,398,293.38/30,503.79
  6. Step 6: Final answer
    x = 20,108.92

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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.