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Finding the Fourth Proportional to 28,043.40, 42,065.10 and 10,512.30

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Solution

The fourth proportional to 28,043.40, 42,065.10 and 10,512.30 is: 15,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,043.40 : 42,065.10 = 10,512.30 : x
  2. Step 2: Convert to fraction form
    28,043.40/42,065.10 = 10,512.30/x
  3. Step 3: Cross multiply
    28,043.40x = 42,065.10 × 10,512.30
  4. Step 4: Simplify right side
    28,043.40x = 442,200,950.73
  5. Step 5: Solve for x
    x = 442,200,950.73/28,043.40
  6. Step 6: Final answer
    x = 15,768.45

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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.