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Finding the Fourth Proportional to 14,235.60, 21,295.80 and 12,507.60

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Solution

The fourth proportional to 14,235.60, 21,295.80 and 12,507.60 is: 18,710.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,235.60 : 21,295.80 = 12,507.60 : x
  2. Step 2: Convert to fraction form
    14,235.60/21,295.80 = 12,507.60/x
  3. Step 3: Cross multiply
    14,235.60x = 21,295.80 × 12,507.60
  4. Step 4: Simplify right side
    14,235.60x = 266,359,348.08
  5. Step 5: Solve for x
    x = 266,359,348.08/14,235.60
  6. Step 6: Final answer
    x = 18,710.79

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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.