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Finding the Fourth Proportional to 28,630.10, 42,949.02 and 9,905.12

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Solution

The fourth proportional to 28,630.10, 42,949.02 and 9,905.12 is: 14,859.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,630.10 : 42,949.02 = 9,905.12 : x
  2. Step 2: Convert to fraction form
    28,630.10/42,949.02 = 9,905.12/x
  3. Step 3: Cross multiply
    28,630.10x = 42,949.02 × 9,905.12
  4. Step 4: Simplify right side
    28,630.10x = 425,415,196.98
  5. Step 5: Solve for x
    x = 425,415,196.98/28,630.10
  6. Step 6: Final answer
    x = 14,859.02

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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.