Home / 28,512.05-39,345.03-15,764.49

Finding the Fourth Proportional to 28,512.05, 39,345.03 and 15,764.49

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Solution

The fourth proportional to 28,512.05, 39,345.03 and 15,764.49 is: 21,754.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.05 : 39,345.03 = 15,764.49 : x
  2. Step 2: Convert to fraction form
    28,512.05/39,345.03 = 15,764.49/x
  3. Step 3: Cross multiply
    28,512.05x = 39,345.03 × 15,764.49
  4. Step 4: Simplify right side
    28,512.05x = 620,254,331.98
  5. Step 5: Solve for x
    x = 620,254,331.98/28,512.05
  6. Step 6: Final answer
    x = 21,754.12

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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.