Home / 20,106.10-27,779.79-15,889.50

Finding the Fourth Proportional to 20,106.10, 27,779.79 and 15,889.50

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Solution

The fourth proportional to 20,106.10, 27,779.79 and 15,889.50 is: 21,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.10 : 27,779.79 = 15,889.50 : x
  2. Step 2: Convert to fraction form
    20,106.10/27,779.79 = 15,889.50/x
  3. Step 3: Cross multiply
    20,106.10x = 27,779.79 × 15,889.50
  4. Step 4: Simplify right side
    20,106.10x = 441,407,032.79
  5. Step 5: Solve for x
    x = 441,407,032.79/20,106.10
  6. Step 6: Final answer
    x = 21,953.88

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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.