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Finding the Fourth Proportional to 28,612.76, 42,910.94 and 9,887.90

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Solution

The fourth proportional to 28,612.76, 42,910.94 and 9,887.90 is: 14,829.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.76 : 42,910.94 = 9,887.90 : x
  2. Step 2: Convert to fraction form
    28,612.76/42,910.94 = 9,887.90/x
  3. Step 3: Cross multiply
    28,612.76x = 42,910.94 × 9,887.90
  4. Step 4: Simplify right side
    28,612.76x = 424,298,893.79
  5. Step 5: Solve for x
    x = 424,298,893.79/28,612.76
  6. Step 6: Final answer
    x = 14,829.01

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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.