Home / 30,549.42-42,158.21-18,612.75

Finding the Fourth Proportional to 30,549.42, 42,158.21 and 18,612.75

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Solution

The fourth proportional to 30,549.42, 42,158.21 and 18,612.75 is: 25,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,549.42 : 42,158.21 = 18,612.75 : x
  2. Step 2: Convert to fraction form
    30,549.42/42,158.21 = 18,612.75/x
  3. Step 3: Cross multiply
    30,549.42x = 42,158.21 × 18,612.75
  4. Step 4: Simplify right side
    30,549.42x = 784,680,288.21
  5. Step 5: Solve for x
    x = 784,680,288.21/30,549.42
  6. Step 6: Final answer
    x = 25,685.60

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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.