Home / 30,885.84-42,628.68-18,308.16

Finding the Fourth Proportional to 30,885.84, 42,628.68 and 18,308.16

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Solution

The fourth proportional to 30,885.84, 42,628.68 and 18,308.16 is: 25,268.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,885.84 : 42,628.68 = 18,308.16 : x
  2. Step 2: Convert to fraction form
    30,885.84/42,628.68 = 18,308.16/x
  3. Step 3: Cross multiply
    30,885.84x = 42,628.68 × 18,308.16
  4. Step 4: Simplify right side
    30,885.84x = 780,452,694.03
  5. Step 5: Solve for x
    x = 780,452,694.03/30,885.84
  6. Step 6: Final answer
    x = 25,268.95

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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.