Home / 28,507.20-39,339.09-15,931.92

Finding the Fourth Proportional to 28,507.20, 39,339.09 and 15,931.92

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Solution

The fourth proportional to 28,507.20, 39,339.09 and 15,931.92 is: 21,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.20 : 39,339.09 = 15,931.92 : x
  2. Step 2: Convert to fraction form
    28,507.20/39,339.09 = 15,931.92/x
  3. Step 3: Cross multiply
    28,507.20x = 39,339.09 × 15,931.92
  4. Step 4: Simplify right side
    28,507.20x = 626,747,234.75
  5. Step 5: Solve for x
    x = 626,747,234.75/28,507.20
  6. Step 6: Final answer
    x = 21,985.58

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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.