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Finding the Fourth Proportional to 20,168.58, 30,248.88 and 19,168.40

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Solution

The fourth proportional to 20,168.58, 30,248.88 and 19,168.40 is: 28,748.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.58 : 30,248.88 = 19,168.40 : x
  2. Step 2: Convert to fraction form
    20,168.58/30,248.88 = 19,168.40/x
  3. Step 3: Cross multiply
    20,168.58x = 30,248.88 × 19,168.40
  4. Step 4: Simplify right side
    20,168.58x = 579,822,635.13
  5. Step 5: Solve for x
    x = 579,822,635.13/20,168.58
  6. Step 6: Final answer
    x = 28,748.81

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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.