Home / 20,637.28-30,939.12-10,243.36

Finding the Fourth Proportional to 20,637.28, 30,939.12 and 10,243.36

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Solution

The fourth proportional to 20,637.28, 30,939.12 and 10,243.36 is: 15,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.28 : 30,939.12 = 10,243.36 : x
  2. Step 2: Convert to fraction form
    20,637.28/30,939.12 = 10,243.36/x
  3. Step 3: Cross multiply
    20,637.28x = 30,939.12 × 10,243.36
  4. Step 4: Simplify right side
    20,637.28x = 316,920,544.24
  5. Step 5: Solve for x
    x = 316,920,544.24/20,637.28
  6. Step 6: Final answer
    x = 15,356.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.