Home / 28,385.96-39,174.37-15,810.71

Finding the Fourth Proportional to 28,385.96, 39,174.37 and 15,810.71

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Solution

The fourth proportional to 28,385.96, 39,174.37 and 15,810.71 is: 21,819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.96 : 39,174.37 = 15,810.71 : x
  2. Step 2: Convert to fraction form
    28,385.96/39,174.37 = 15,810.71/x
  3. Step 3: Cross multiply
    28,385.96x = 39,174.37 × 15,810.71
  4. Step 4: Simplify right side
    28,385.96x = 619,374,368.10
  5. Step 5: Solve for x
    x = 619,374,368.10/28,385.96
  6. Step 6: Final answer
    x = 21,819.75

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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.