Home / 28,311.15-39,069.75-15,564.27

Finding the Fourth Proportional to 28,311.15, 39,069.75 and 15,564.27

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Solution

The fourth proportional to 28,311.15, 39,069.75 and 15,564.27 is: 21,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.15 : 39,069.75 = 15,564.27 : x
  2. Step 2: Convert to fraction form
    28,311.15/39,069.75 = 15,564.27/x
  3. Step 3: Cross multiply
    28,311.15x = 39,069.75 × 15,564.27
  4. Step 4: Simplify right side
    28,311.15x = 608,092,137.83
  5. Step 5: Solve for x
    x = 608,092,137.83/28,311.15
  6. Step 6: Final answer
    x = 21,478.89

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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.