Home / 30,865.61-42,594.23-18,116.54

Finding the Fourth Proportional to 30,865.61, 42,594.23 and 18,116.54

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Solution

The fourth proportional to 30,865.61, 42,594.23 and 18,116.54 is: 25,000.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.61 : 42,594.23 = 18,116.54 : x
  2. Step 2: Convert to fraction form
    30,865.61/42,594.23 = 18,116.54/x
  3. Step 3: Cross multiply
    30,865.61x = 42,594.23 × 18,116.54
  4. Step 4: Simplify right side
    30,865.61x = 771,660,071.56
  5. Step 5: Solve for x
    x = 771,660,071.56/30,865.61
  6. Step 6: Final answer
    x = 25,000.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.