Home / 30,964.50-42,715.38-18,209.57

Finding the Fourth Proportional to 30,964.50, 42,715.38 and 18,209.57

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Solution

The fourth proportional to 30,964.50, 42,715.38 and 18,209.57 is: 25,120.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,964.50 : 42,715.38 = 18,209.57 : x
  2. Step 2: Convert to fraction form
    30,964.50/42,715.38 = 18,209.57/x
  3. Step 3: Cross multiply
    30,964.50x = 42,715.38 × 18,209.57
  4. Step 4: Simplify right side
    30,964.50x = 777,828,488.61
  5. Step 5: Solve for x
    x = 777,828,488.61/30,964.50
  6. Step 6: Final answer
    x = 25,120.01

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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.