Home / 15,789.11-21,779.22-9,411.41

Finding the Fourth Proportional to 15,789.11, 21,779.22 and 9,411.41

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Solution

The fourth proportional to 15,789.11, 21,779.22 and 9,411.41 is: 12,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.11 : 21,779.22 = 9,411.41 : x
  2. Step 2: Convert to fraction form
    15,789.11/21,779.22 = 9,411.41/x
  3. Step 3: Cross multiply
    15,789.11x = 21,779.22 × 9,411.41
  4. Step 4: Simplify right side
    15,789.11x = 204,973,060.00
  5. Step 5: Solve for x
    x = 204,973,060.00/15,789.11
  6. Step 6: Final answer
    x = 12,981.93

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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.