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Finding the Fourth Proportional to 18,819.47, 25,966.71 and 10,860.01

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Solution

The fourth proportional to 18,819.47, 25,966.71 and 10,860.01 is: 14,984.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.47 : 25,966.71 = 10,860.01 : x
  2. Step 2: Convert to fraction form
    18,819.47/25,966.71 = 10,860.01/x
  3. Step 3: Cross multiply
    18,819.47x = 25,966.71 × 10,860.01
  4. Step 4: Simplify right side
    18,819.47x = 281,998,730.27
  5. Step 5: Solve for x
    x = 281,998,730.27/18,819.47
  6. Step 6: Final answer
    x = 14,984.41

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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.