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Finding the Fourth Proportional to 14,287.71, 19,715.30 and 8,318.42

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Solution

The fourth proportional to 14,287.71, 19,715.30 and 8,318.42 is: 11,478.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.71 : 19,715.30 = 8,318.42 : x
  2. Step 2: Convert to fraction form
    14,287.71/19,715.30 = 8,318.42/x
  3. Step 3: Cross multiply
    14,287.71x = 19,715.30 × 8,318.42
  4. Step 4: Simplify right side
    14,287.71x = 164,000,047.25
  5. Step 5: Solve for x
    x = 164,000,047.25/14,287.71
  6. Step 6: Final answer
    x = 11,478.40

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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.