Home / 21,123.08-29,135.40-13,162.40

Finding the Fourth Proportional to 21,123.08, 29,135.40 and 13,162.40

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Solution

The fourth proportional to 21,123.08, 29,135.40 and 13,162.40 is: 18,155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.08 : 29,135.40 = 13,162.40 : x
  2. Step 2: Convert to fraction form
    21,123.08/29,135.40 = 13,162.40/x
  3. Step 3: Cross multiply
    21,123.08x = 29,135.40 × 13,162.40
  4. Step 4: Simplify right side
    21,123.08x = 383,491,788.96
  5. Step 5: Solve for x
    x = 383,491,788.96/21,123.08
  6. Step 6: Final answer
    x = 18,155.11

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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.