Home / 15,279.53-21,090.23-9,975.14

Finding the Fourth Proportional to 15,279.53, 21,090.23 and 9,975.14

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Solution

The fourth proportional to 15,279.53, 21,090.23 and 9,975.14 is: 13,768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.53 : 21,090.23 = 9,975.14 : x
  2. Step 2: Convert to fraction form
    15,279.53/21,090.23 = 9,975.14/x
  3. Step 3: Cross multiply
    15,279.53x = 21,090.23 × 9,975.14
  4. Step 4: Simplify right side
    15,279.53x = 210,377,841.56
  5. Step 5: Solve for x
    x = 210,377,841.56/15,279.53
  6. Step 6: Final answer
    x = 13,768.61

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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.