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Finding the Fourth Proportional to 14,059.60, 21,065.10 and 12,115.60

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Solution

The fourth proportional to 14,059.60, 21,065.10 and 12,115.60 is: 18,152.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,059.60 : 21,065.10 = 12,115.60 : x
  2. Step 2: Convert to fraction form
    14,059.60/21,065.10 = 12,115.60/x
  3. Step 3: Cross multiply
    14,059.60x = 21,065.10 × 12,115.60
  4. Step 4: Simplify right side
    14,059.60x = 255,216,325.56
  5. Step 5: Solve for x
    x = 255,216,325.56/14,059.60
  6. Step 6: Final answer
    x = 18,152.46

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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.