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Finding the Fourth Proportional to 30,256.80, 45,401.40 and 13,619.40

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Solution

The fourth proportional to 30,256.80, 45,401.40 and 13,619.40 is: 20,436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,256.80 : 45,401.40 = 13,619.40 : x
  2. Step 2: Convert to fraction form
    30,256.80/45,401.40 = 13,619.40/x
  3. Step 3: Cross multiply
    30,256.80x = 45,401.40 × 13,619.40
  4. Step 4: Simplify right side
    30,256.80x = 618,339,827.16
  5. Step 5: Solve for x
    x = 618,339,827.16/30,256.80
  6. Step 6: Final answer
    x = 20,436.39

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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.