Home / 28,189.88-38,903.31-15,614.63

Finding the Fourth Proportional to 28,189.88, 38,903.31 and 15,614.63

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Solution

The fourth proportional to 28,189.88, 38,903.31 and 15,614.63 is: 21,548.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.88 : 38,903.31 = 15,614.63 : x
  2. Step 2: Convert to fraction form
    28,189.88/38,903.31 = 15,614.63/x
  3. Step 3: Cross multiply
    28,189.88x = 38,903.31 × 15,614.63
  4. Step 4: Simplify right side
    28,189.88x = 607,460,596.91
  5. Step 5: Solve for x
    x = 607,460,596.91/28,189.88
  6. Step 6: Final answer
    x = 21,548.89

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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.