Home / 30,639.97-42,281.53-17,211.79

Finding the Fourth Proportional to 30,639.97, 42,281.53 and 17,211.79

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Solution

The fourth proportional to 30,639.97, 42,281.53 and 17,211.79 is: 23,751.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.97 : 42,281.53 = 17,211.79 : x
  2. Step 2: Convert to fraction form
    30,639.97/42,281.53 = 17,211.79/x
  3. Step 3: Cross multiply
    30,639.97x = 42,281.53 × 17,211.79
  4. Step 4: Simplify right side
    30,639.97x = 727,740,815.24
  5. Step 5: Solve for x
    x = 727,740,815.24/30,639.97
  6. Step 6: Final answer
    x = 23,751.36

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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.