Home / 21,870.46-30,181.89-20,532.79

Finding the Fourth Proportional to 21,870.46, 30,181.89 and 20,532.79

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Solution

The fourth proportional to 21,870.46, 30,181.89 and 20,532.79 is: 28,335.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.46 : 30,181.89 = 20,532.79 : x
  2. Step 2: Convert to fraction form
    21,870.46/30,181.89 = 20,532.79/x
  3. Step 3: Cross multiply
    21,870.46x = 30,181.89 × 20,532.79
  4. Step 4: Simplify right side
    21,870.46x = 619,718,409.17
  5. Step 5: Solve for x
    x = 619,718,409.17/21,870.46
  6. Step 6: Final answer
    x = 28,335.87

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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.