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Finding the Fourth Proportional to 19,716.72, 29,580.40 and 8,624.40

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Solution

The fourth proportional to 19,716.72, 29,580.40 and 8,624.40 is: 12,938.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,716.72 : 29,580.40 = 8,624.40 : x
  2. Step 2: Convert to fraction form
    19,716.72/29,580.40 = 8,624.40/x
  3. Step 3: Cross multiply
    19,716.72x = 29,580.40 × 8,624.40
  4. Step 4: Simplify right side
    19,716.72x = 255,113,201.76
  5. Step 5: Solve for x
    x = 255,113,201.76/19,716.72
  6. Step 6: Final answer
    x = 12,938.93

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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.