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Finding the Fourth Proportional to 14,235.63, 21,345.90 and 7,118.76

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Solution

The fourth proportional to 14,235.63, 21,345.90 and 7,118.76 is: 10,674.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,235.63 : 21,345.90 = 7,118.76 : x
  2. Step 2: Convert to fraction form
    14,235.63/21,345.90 = 7,118.76/x
  3. Step 3: Cross multiply
    14,235.63x = 21,345.90 × 7,118.76
  4. Step 4: Simplify right side
    14,235.63x = 151,956,339.08
  5. Step 5: Solve for x
    x = 151,956,339.08/14,235.63
  6. Step 6: Final answer
    x = 10,674.37

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Half scale
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Double scale
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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.