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Finding the Fourth Proportional to 14,287.18, 19,716.45 and 7,913.96

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Solution

The fourth proportional to 14,287.18, 19,716.45 and 7,913.96 is: 10,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.18 : 19,716.45 = 7,913.96 : x
  2. Step 2: Convert to fraction form
    14,287.18/19,716.45 = 7,913.96/x
  3. Step 3: Cross multiply
    14,287.18x = 19,716.45 × 7,913.96
  4. Step 4: Simplify right side
    14,287.18x = 156,035,196.64
  5. Step 5: Solve for x
    x = 156,035,196.64/14,287.18
  6. Step 6: Final answer
    x = 10,921.35

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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.