Home / 15,449.89-21,320.88-8,376.31

Finding the Fourth Proportional to 15,449.89, 21,320.88 and 8,376.31

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Solution

The fourth proportional to 15,449.89, 21,320.88 and 8,376.31 is: 11,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.89 : 21,320.88 = 8,376.31 : x
  2. Step 2: Convert to fraction form
    15,449.89/21,320.88 = 8,376.31/x
  3. Step 3: Cross multiply
    15,449.89x = 21,320.88 × 8,376.31
  4. Step 4: Simplify right side
    15,449.89x = 178,590,300.35
  5. Step 5: Solve for x
    x = 178,590,300.35/15,449.89
  6. Step 6: Final answer
    x = 11,559.33

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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.