Home / 30,689.26-42,306.74-20,323.68

Finding the Fourth Proportional to 30,689.26, 42,306.74 and 20,323.68

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Solution

The fourth proportional to 30,689.26, 42,306.74 and 20,323.68 is: 28,017.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.26 : 42,306.74 = 20,323.68 : x
  2. Step 2: Convert to fraction form
    30,689.26/42,306.74 = 20,323.68/x
  3. Step 3: Cross multiply
    30,689.26x = 42,306.74 × 20,323.68
  4. Step 4: Simplify right side
    30,689.26x = 859,828,645.60
  5. Step 5: Solve for x
    x = 859,828,645.60/30,689.26
  6. Step 6: Final answer
    x = 28,017.25

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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.