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Finding the Fourth Proportional to 28,008.61, 38,650.07 and 16,678.93

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Solution

The fourth proportional to 28,008.61, 38,650.07 and 16,678.93 is: 23,015.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.61 : 38,650.07 = 16,678.93 : x
  2. Step 2: Convert to fraction form
    28,008.61/38,650.07 = 16,678.93/x
  3. Step 3: Cross multiply
    28,008.61x = 38,650.07 × 16,678.93
  4. Step 4: Simplify right side
    28,008.61x = 644,641,812.03
  5. Step 5: Solve for x
    x = 644,641,812.03/28,008.61
  6. Step 6: Final answer
    x = 23,015.84

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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.