Home / 28,020.92-38,670.30-15,445.64

Finding the Fourth Proportional to 28,020.92, 38,670.30 and 15,445.64

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Solution

The fourth proportional to 28,020.92, 38,670.30 and 15,445.64 is: 21,315.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020.92 : 38,670.30 = 15,445.64 : x
  2. Step 2: Convert to fraction form
    28,020.92/38,670.30 = 15,445.64/x
  3. Step 3: Cross multiply
    28,020.92x = 38,670.30 × 15,445.64
  4. Step 4: Simplify right side
    28,020.92x = 597,287,532.49
  5. Step 5: Solve for x
    x = 597,287,532.49/28,020.92
  6. Step 6: Final answer
    x = 21,315.77

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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.