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Finding the Fourth Proportional to 28,628.10, 42,946.02 and 9,903.12

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Solution

The fourth proportional to 28,628.10, 42,946.02 and 9,903.12 is: 14,856.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.10 : 42,946.02 = 9,903.12 : x
  2. Step 2: Convert to fraction form
    28,628.10/42,946.02 = 9,903.12/x
  3. Step 3: Cross multiply
    28,628.10x = 42,946.02 × 9,903.12
  4. Step 4: Simplify right side
    28,628.10x = 425,299,589.58
  5. Step 5: Solve for x
    x = 425,299,589.58/28,628.10
  6. Step 6: Final answer
    x = 14,856.02

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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.