Home / 28,278.36-39,024.49-15,529.68

Finding the Fourth Proportional to 28,278.36, 39,024.49 and 15,529.68

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Solution

The fourth proportional to 28,278.36, 39,024.49 and 15,529.68 is: 21,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.36 : 39,024.49 = 15,529.68 : x
  2. Step 2: Convert to fraction form
    28,278.36/39,024.49 = 15,529.68/x
  3. Step 3: Cross multiply
    28,278.36x = 39,024.49 × 15,529.68
  4. Step 4: Simplify right side
    28,278.36x = 606,037,841.86
  5. Step 5: Solve for x
    x = 606,037,841.86/28,278.36
  6. Step 6: Final answer
    x = 21,431.15

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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.