Home / 28,617.89-39,491.94-15,870.86

Finding the Fourth Proportional to 28,617.89, 39,491.94 and 15,870.86

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Solution

The fourth proportional to 28,617.89, 39,491.94 and 15,870.86 is: 21,901.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.89 : 39,491.94 = 15,870.86 : x
  2. Step 2: Convert to fraction form
    28,617.89/39,491.94 = 15,870.86/x
  3. Step 3: Cross multiply
    28,617.89x = 39,491.94 × 15,870.86
  4. Step 4: Simplify right side
    28,617.89x = 626,770,853.41
  5. Step 5: Solve for x
    x = 626,770,853.41/28,617.89
  6. Step 6: Final answer
    x = 21,901.37

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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.