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Finding the Fourth Proportional to 28,513.20, 42,672.60 and 28,513.20

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Solution

The fourth proportional to 28,513.20, 42,672.60 and 28,513.20 is: 42,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.20 : 42,672.60 = 28,513.20 : x
  2. Step 2: Convert to fraction form
    28,513.20/42,672.60 = 28,513.20/x
  3. Step 3: Cross multiply
    28,513.20x = 42,672.60 × 28,513.20
  4. Step 4: Simplify right side
    28,513.20x = 1,216,732,378.32
  5. Step 5: Solve for x
    x = 1,216,732,378.32/28,513.20
  6. Step 6: Final answer
    x = 42,672.60

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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.