Home / 28,015.11-38,661.03-15,439.86

Finding the Fourth Proportional to 28,015.11, 38,661.03 and 15,439.86

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Solution

The fourth proportional to 28,015.11, 38,661.03 and 15,439.86 is: 21,307.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.11 : 38,661.03 = 15,439.86 : x
  2. Step 2: Convert to fraction form
    28,015.11/38,661.03 = 15,439.86/x
  3. Step 3: Cross multiply
    28,015.11x = 38,661.03 × 15,439.86
  4. Step 4: Simplify right side
    28,015.11x = 596,920,890.66
  5. Step 5: Solve for x
    x = 596,920,890.66/28,015.11
  6. Step 6: Final answer
    x = 21,307.11

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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.