Home / 18,812.84-28,219.32-4,772.88

Finding the Fourth Proportional to 18,812.84, 28,219.32 and 4,772.88

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Solution

The fourth proportional to 18,812.84, 28,219.32 and 4,772.88 is: 7,159.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.84 : 28,219.32 = 4,772.88 : x
  2. Step 2: Convert to fraction form
    18,812.84/28,219.32 = 4,772.88/x
  3. Step 3: Cross multiply
    18,812.84x = 28,219.32 × 4,772.88
  4. Step 4: Simplify right side
    18,812.84x = 134,687,428.04
  5. Step 5: Solve for x
    x = 134,687,428.04/18,812.84
  6. Step 6: Final answer
    x = 7,159.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.