Home / 20,657.28-31,015.08-13,141.29

Finding the Fourth Proportional to 20,657.28, 31,015.08 and 13,141.29

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Solution

The fourth proportional to 20,657.28, 31,015.08 and 13,141.29 is: 19,730.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.28 : 31,015.08 = 13,141.29 : x
  2. Step 2: Convert to fraction form
    20,657.28/31,015.08 = 13,141.29/x
  3. Step 3: Cross multiply
    20,657.28x = 31,015.08 × 13,141.29
  4. Step 4: Simplify right side
    20,657.28x = 407,578,160.65
  5. Step 5: Solve for x
    x = 407,578,160.65/20,657.28
  6. Step 6: Final answer
    x = 19,730.49

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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.