Home / 14,123.78-19,490.91-8,155.43

Finding the Fourth Proportional to 14,123.78, 19,490.91 and 8,155.43

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Solution

The fourth proportional to 14,123.78, 19,490.91 and 8,155.43 is: 11,254.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,123.78 : 19,490.91 = 8,155.43 : x
  2. Step 2: Convert to fraction form
    14,123.78/19,490.91 = 8,155.43/x
  3. Step 3: Cross multiply
    14,123.78x = 19,490.91 × 8,155.43
  4. Step 4: Simplify right side
    14,123.78x = 158,956,800.87
  5. Step 5: Solve for x
    x = 158,956,800.87/14,123.78
  6. Step 6: Final answer
    x = 11,254.55

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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.