Home / 28,121.28-38,807.54-15,374.49

Finding the Fourth Proportional to 28,121.28, 38,807.54 and 15,374.49

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Solution

The fourth proportional to 28,121.28, 38,807.54 and 15,374.49 is: 21,216.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.28 : 38,807.54 = 15,374.49 : x
  2. Step 2: Convert to fraction form
    28,121.28/38,807.54 = 15,374.49/x
  3. Step 3: Cross multiply
    28,121.28x = 38,807.54 × 15,374.49
  4. Step 4: Simplify right side
    28,121.28x = 596,646,135.65
  5. Step 5: Solve for x
    x = 596,646,135.65/28,121.28
  6. Step 6: Final answer
    x = 21,216.89

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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.