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Finding the Fourth Proportional to 30,579.74, 45,876.84 and 9,518.80

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Solution

The fourth proportional to 30,579.74, 45,876.84 and 9,518.80 is: 14,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.74 : 45,876.84 = 9,518.80 : x
  2. Step 2: Convert to fraction form
    30,579.74/45,876.84 = 9,518.80/x
  3. Step 3: Cross multiply
    30,579.74x = 45,876.84 × 9,518.80
  4. Step 4: Simplify right side
    30,579.74x = 436,692,464.59
  5. Step 5: Solve for x
    x = 436,692,464.59/30,579.74
  6. Step 6: Final answer
    x = 14,280.45

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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.