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Finding the Fourth Proportional to 28,137.60, 42,206.40 and 14,983.20

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Solution

The fourth proportional to 28,137.60, 42,206.40 and 14,983.20 is: 22,474.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.60 : 42,206.40 = 14,983.20 : x
  2. Step 2: Convert to fraction form
    28,137.60/42,206.40 = 14,983.20/x
  3. Step 3: Cross multiply
    28,137.60x = 42,206.40 × 14,983.20
  4. Step 4: Simplify right side
    28,137.60x = 632,386,932.48
  5. Step 5: Solve for x
    x = 632,386,932.48/28,137.60
  6. Step 6: Final answer
    x = 22,474.80

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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.