Home / 28,709.87-39,627.45-18,637.76

Finding the Fourth Proportional to 28,709.87, 39,627.45 and 18,637.76

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Solution

The fourth proportional to 28,709.87, 39,627.45 and 18,637.76 is: 25,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,709.87 : 39,627.45 = 18,637.76 : x
  2. Step 2: Convert to fraction form
    28,709.87/39,627.45 = 18,637.76/x
  3. Step 3: Cross multiply
    28,709.87x = 39,627.45 × 18,637.76
  4. Step 4: Simplify right side
    28,709.87x = 738,567,001.58
  5. Step 5: Solve for x
    x = 738,567,001.58/28,709.87
  6. Step 6: Final answer
    x = 25,725.20

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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.