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Finding the Fourth Proportional to 13,495.71, 20,243.56 and 6,917.70

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Solution

The fourth proportional to 13,495.71, 20,243.56 and 6,917.70 is: 10,376.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,495.71 : 20,243.56 = 6,917.70 : x
  2. Step 2: Convert to fraction form
    13,495.71/20,243.56 = 6,917.70/x
  3. Step 3: Cross multiply
    13,495.71x = 20,243.56 × 6,917.70
  4. Step 4: Simplify right side
    13,495.71x = 140,038,875.01
  5. Step 5: Solve for x
    x = 140,038,875.01/13,495.71
  6. Step 6: Final answer
    x = 10,376.55

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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.