Home / 28,236.87-38,967.08-15,661.62

Finding the Fourth Proportional to 28,236.87, 38,967.08 and 15,661.62

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Solution

The fourth proportional to 28,236.87, 38,967.08 and 15,661.62 is: 21,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.87 : 38,967.08 = 15,661.62 : x
  2. Step 2: Convert to fraction form
    28,236.87/38,967.08 = 15,661.62/x
  3. Step 3: Cross multiply
    28,236.87x = 38,967.08 × 15,661.62
  4. Step 4: Simplify right side
    28,236.87x = 610,287,521.16
  5. Step 5: Solve for x
    x = 610,287,521.16/28,236.87
  6. Step 6: Final answer
    x = 21,613.14

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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.