Home / 30,711.80-42,378.80-17,282.70

Finding the Fourth Proportional to 30,711.80, 42,378.80 and 17,282.70

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Solution

The fourth proportional to 30,711.80, 42,378.80 and 17,282.70 is: 23,848.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,711.80 : 42,378.80 = 17,282.70 : x
  2. Step 2: Convert to fraction form
    30,711.80/42,378.80 = 17,282.70/x
  3. Step 3: Cross multiply
    30,711.80x = 42,378.80 × 17,282.70
  4. Step 4: Simplify right side
    30,711.80x = 732,420,000.35
  5. Step 5: Solve for x
    x = 732,420,000.35/30,711.80
  6. Step 6: Final answer
    x = 23,848.17

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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.