Home / 28,278.52-39,025.02-15,703

Finding the Fourth Proportional to 28,278.52, 39,025.02 and 15,703

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Solution

The fourth proportional to 28,278.52, 39,025.02 and 15,703 is: 21,670.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.52 : 39,025.02 = 15,703 : x
  2. Step 2: Convert to fraction form
    28,278.52/39,025.02 = 15,703/x
  3. Step 3: Cross multiply
    28,278.52x = 39,025.02 × 15,703
  4. Step 4: Simplify right side
    28,278.52x = 612,809,889.06
  5. Step 5: Solve for x
    x = 612,809,889.06/28,278.52
  6. Step 6: Final answer
    x = 21,670.51

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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.