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Finding the Fourth Proportional to 13,916.31, 20,750.31 and 12,370.83

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Solution

The fourth proportional to 13,916.31, 20,750.31 and 12,370.83 is: 18,445.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,916.31 : 20,750.31 = 12,370.83 : x
  2. Step 2: Convert to fraction form
    13,916.31/20,750.31 = 12,370.83/x
  3. Step 3: Cross multiply
    13,916.31x = 20,750.31 × 12,370.83
  4. Step 4: Simplify right side
    13,916.31x = 256,698,557.46
  5. Step 5: Solve for x
    x = 256,698,557.46/13,916.31
  6. Step 6: Final answer
    x = 18,445.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.