Home / 21,775.61-30,050.93-12,821.47

Finding the Fourth Proportional to 21,775.61, 30,050.93 and 12,821.47

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Solution

The fourth proportional to 21,775.61, 30,050.93 and 12,821.47 is: 17,693.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.61 : 30,050.93 = 12,821.47 : x
  2. Step 2: Convert to fraction form
    21,775.61/30,050.93 = 12,821.47/x
  3. Step 3: Cross multiply
    21,775.61x = 30,050.93 × 12,821.47
  4. Step 4: Simplify right side
    21,775.61x = 385,297,054.39
  5. Step 5: Solve for x
    x = 385,297,054.39/21,775.61
  6. Step 6: Final answer
    x = 17,693.97

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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.