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Finding the Fourth Proportional to 18,904.86, 28,337.54 and 7,053.48

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Solution

The fourth proportional to 18,904.86, 28,337.54 and 7,053.48 is: 10,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.86 : 28,337.54 = 7,053.48 : x
  2. Step 2: Convert to fraction form
    18,904.86/28,337.54 = 7,053.48/x
  3. Step 3: Cross multiply
    18,904.86x = 28,337.54 × 7,053.48
  4. Step 4: Simplify right side
    18,904.86x = 199,878,271.64
  5. Step 5: Solve for x
    x = 199,878,271.64/18,904.86
  6. Step 6: Final answer
    x = 10,572.85

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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.