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Finding the Fourth Proportional to 30,356.88, 45,513.80 and 11,621.12

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Solution

The fourth proportional to 30,356.88, 45,513.80 and 11,621.12 is: 17,423.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,356.88 : 45,513.80 = 11,621.12 : x
  2. Step 2: Convert to fraction form
    30,356.88/45,513.80 = 11,621.12/x
  3. Step 3: Cross multiply
    30,356.88x = 45,513.80 × 11,621.12
  4. Step 4: Simplify right side
    30,356.88x = 528,921,331.46
  5. Step 5: Solve for x
    x = 528,921,331.46/30,356.88
  6. Step 6: Final answer
    x = 17,423.44

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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.