Home / 28,487.78-39,313.21-15,741.32

Finding the Fourth Proportional to 28,487.78, 39,313.21 and 15,741.32

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Solution

The fourth proportional to 28,487.78, 39,313.21 and 15,741.32 is: 21,723.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.78 : 39,313.21 = 15,741.32 : x
  2. Step 2: Convert to fraction form
    28,487.78/39,313.21 = 15,741.32/x
  3. Step 3: Cross multiply
    28,487.78x = 39,313.21 × 15,741.32
  4. Step 4: Simplify right side
    28,487.78x = 618,841,582.92
  5. Step 5: Solve for x
    x = 618,841,582.92/28,487.78
  6. Step 6: Final answer
    x = 21,723.06

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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.