Home / 28,289.58-39,039.64-15,543.58

Finding the Fourth Proportional to 28,289.58, 39,039.64 and 15,543.58

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Solution

The fourth proportional to 28,289.58, 39,039.64 and 15,543.58 is: 21,450.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.58 : 39,039.64 = 15,543.58 : x
  2. Step 2: Convert to fraction form
    28,289.58/39,039.64 = 15,543.58/x
  3. Step 3: Cross multiply
    28,289.58x = 39,039.64 × 15,543.58
  4. Step 4: Simplify right side
    28,289.58x = 606,815,767.51
  5. Step 5: Solve for x
    x = 606,815,767.51/28,289.58
  6. Step 6: Final answer
    x = 21,450.15

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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.