Home / 28,274.47-39,018.78-15,699.22

Finding the Fourth Proportional to 28,274.47, 39,018.78 and 15,699.22

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Solution

The fourth proportional to 28,274.47, 39,018.78 and 15,699.22 is: 21,664.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,274.47 : 39,018.78 = 15,699.22 : x
  2. Step 2: Convert to fraction form
    28,274.47/39,018.78 = 15,699.22/x
  3. Step 3: Cross multiply
    28,274.47x = 39,018.78 × 15,699.22
  4. Step 4: Simplify right side
    28,274.47x = 612,564,313.80
  5. Step 5: Solve for x
    x = 612,564,313.80/28,274.47
  6. Step 6: Final answer
    x = 21,664.93

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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.