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Finding the Fourth Proportional to 28,784.03, 39,715.04 and 16,208.78

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Solution

The fourth proportional to 28,784.03, 39,715.04 and 16,208.78 is: 22,364.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,784.03 : 39,715.04 = 16,208.78 : x
  2. Step 2: Convert to fraction form
    28,784.03/39,715.04 = 16,208.78/x
  3. Step 3: Cross multiply
    28,784.03x = 39,715.04 × 16,208.78
  4. Step 4: Simplify right side
    28,784.03x = 643,732,188.00
  5. Step 5: Solve for x
    x = 643,732,188.00/28,784.03
  6. Step 6: Final answer
    x = 22,364.22

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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.