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Finding the Fourth Proportional to 18,984.10, 28,476.15 and 5,133.10

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Solution

The fourth proportional to 18,984.10, 28,476.15 and 5,133.10 is: 7,699.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.10 : 28,476.15 = 5,133.10 : x
  2. Step 2: Convert to fraction form
    18,984.10/28,476.15 = 5,133.10/x
  3. Step 3: Cross multiply
    18,984.10x = 28,476.15 × 5,133.10
  4. Step 4: Simplify right side
    18,984.10x = 146,170,925.57
  5. Step 5: Solve for x
    x = 146,170,925.57/18,984.10
  6. Step 6: Final answer
    x = 7,699.65

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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.