Home / 30,955.29-42,717.69-18,209.85

Finding the Fourth Proportional to 30,955.29, 42,717.69 and 18,209.85

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Solution

The fourth proportional to 30,955.29, 42,717.69 and 18,209.85 is: 25,129.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,955.29 : 42,717.69 = 18,209.85 : x
  2. Step 2: Convert to fraction form
    30,955.29/42,717.69 = 18,209.85/x
  3. Step 3: Cross multiply
    30,955.29x = 42,717.69 × 18,209.85
  4. Step 4: Simplify right side
    30,955.29x = 777,882,727.25
  5. Step 5: Solve for x
    x = 777,882,727.25/30,955.29
  6. Step 6: Final answer
    x = 25,129.23

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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.