Home / 30,171.30-45,274.60-12,639.66

Finding the Fourth Proportional to 30,171.30, 45,274.60 and 12,639.66

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Solution

The fourth proportional to 30,171.30, 45,274.60 and 12,639.66 is: 18,966.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,171.30 : 45,274.60 = 12,639.66 : x
  2. Step 2: Convert to fraction form
    30,171.30/45,274.60 = 12,639.66/x
  3. Step 3: Cross multiply
    30,171.30x = 45,274.60 × 12,639.66
  4. Step 4: Simplify right side
    30,171.30x = 572,255,550.64
  5. Step 5: Solve for x
    x = 572,255,550.64/30,171.30
  6. Step 6: Final answer
    x = 18,966.88

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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.