Home / 30,549.60-42,158.88-18,613.44

Finding the Fourth Proportional to 30,549.60, 42,158.88 and 18,613.44

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Solution

The fourth proportional to 30,549.60, 42,158.88 and 18,613.44 is: 25,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,549.60 : 42,158.88 = 18,613.44 : x
  2. Step 2: Convert to fraction form
    30,549.60/42,158.88 = 18,613.44/x
  3. Step 3: Cross multiply
    30,549.60x = 42,158.88 × 18,613.44
  4. Step 4: Simplify right side
    30,549.60x = 784,721,783.35
  5. Step 5: Solve for x
    x = 784,721,783.35/30,549.60
  6. Step 6: Final answer
    x = 25,686.81

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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.