Home / 30,841.17-42,538.86-21,284.70

Finding the Fourth Proportional to 30,841.17, 42,538.86 and 21,284.70

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Solution

The fourth proportional to 30,841.17, 42,538.86 and 21,284.70 is: 29,357.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,841.17 : 42,538.86 = 21,284.70 : x
  2. Step 2: Convert to fraction form
    30,841.17/42,538.86 = 21,284.70/x
  3. Step 3: Cross multiply
    30,841.17x = 42,538.86 × 21,284.70
  4. Step 4: Simplify right side
    30,841.17x = 905,426,873.44
  5. Step 5: Solve for x
    x = 905,426,873.44/30,841.17
  6. Step 6: Final answer
    x = 29,357.73

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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.