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Finding the Fourth Proportional to 14,207.60, 19,606.08 and 7,919.84

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Solution

The fourth proportional to 14,207.60, 19,606.08 and 7,919.84 is: 10,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,207.60 : 19,606.08 = 7,919.84 : x
  2. Step 2: Convert to fraction form
    14,207.60/19,606.08 = 7,919.84/x
  3. Step 3: Cross multiply
    14,207.60x = 19,606.08 × 7,919.84
  4. Step 4: Simplify right side
    14,207.60x = 155,277,016.63
  5. Step 5: Solve for x
    x = 155,277,016.63/14,207.60
  6. Step 6: Final answer
    x = 10,929.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.