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Finding the Fourth Proportional to 18,697.52, 28,070.78 and 13,153.47

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Solution

The fourth proportional to 18,697.52, 28,070.78 and 13,153.47 is: 19,747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.52 : 28,070.78 = 13,153.47 : x
  2. Step 2: Convert to fraction form
    18,697.52/28,070.78 = 13,153.47/x
  3. Step 3: Cross multiply
    18,697.52x = 28,070.78 × 13,153.47
  4. Step 4: Simplify right side
    18,697.52x = 369,228,096.84
  5. Step 5: Solve for x
    x = 369,228,096.84/18,697.52
  6. Step 6: Final answer
    x = 19,747.44

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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.