Home / 30,956.28-42,719.84-18,209.99

Finding the Fourth Proportional to 30,956.28, 42,719.84 and 18,209.99

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Solution

The fourth proportional to 30,956.28, 42,719.84 and 18,209.99 is: 25,129.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,956.28 : 42,719.84 = 18,209.99 : x
  2. Step 2: Convert to fraction form
    30,956.28/42,719.84 = 18,209.99/x
  3. Step 3: Cross multiply
    30,956.28x = 42,719.84 × 18,209.99
  4. Step 4: Simplify right side
    30,956.28x = 777,927,554.55
  5. Step 5: Solve for x
    x = 777,927,554.55/30,956.28
  6. Step 6: Final answer
    x = 25,129.88

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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.