Home / 30,865.61-42,594.19-18,116.55

Finding the Fourth Proportional to 30,865.61, 42,594.19 and 18,116.55

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Solution

The fourth proportional to 30,865.61, 42,594.19 and 18,116.55 is: 25,000.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.61 : 42,594.19 = 18,116.55 : x
  2. Step 2: Convert to fraction form
    30,865.61/42,594.19 = 18,116.55/x
  3. Step 3: Cross multiply
    30,865.61x = 42,594.19 × 18,116.55
  4. Step 4: Simplify right side
    30,865.61x = 771,659,727.55
  5. Step 5: Solve for x
    x = 771,659,727.55/30,865.61
  6. Step 6: Final answer
    x = 25,000.63

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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.