Home / 20,240.47-27,939.56-15,219.28

Finding the Fourth Proportional to 20,240.47, 27,939.56 and 15,219.28

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Solution

The fourth proportional to 20,240.47, 27,939.56 and 15,219.28 is: 21,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.47 : 27,939.56 = 15,219.28 : x
  2. Step 2: Convert to fraction form
    20,240.47/27,939.56 = 15,219.28/x
  3. Step 3: Cross multiply
    20,240.47x = 27,939.56 × 15,219.28
  4. Step 4: Simplify right side
    20,240.47x = 425,219,986.72
  5. Step 5: Solve for x
    x = 425,219,986.72/20,240.47
  6. Step 6: Final answer
    x = 21,008.40

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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.