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Finding the Fourth Proportional to 28,408.50, 39,203.88 and 16,478.91

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Solution

The fourth proportional to 28,408.50, 39,203.88 and 16,478.91 is: 22,740.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.50 : 39,203.88 = 16,478.91 : x
  2. Step 2: Convert to fraction form
    28,408.50/39,203.88 = 16,478.91/x
  3. Step 3: Cross multiply
    28,408.50x = 39,203.88 × 16,478.91
  4. Step 4: Simplify right side
    28,408.50x = 646,037,210.17
  5. Step 5: Solve for x
    x = 646,037,210.17/28,408.50
  6. Step 6: Final answer
    x = 22,740.98

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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.