Home / 15,487.78-21,376.53-10,183.09

Finding the Fourth Proportional to 15,487.78, 21,376.53 and 10,183.09

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Solution

The fourth proportional to 15,487.78, 21,376.53 and 10,183.09 is: 14,054.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.78 : 21,376.53 = 10,183.09 : x
  2. Step 2: Convert to fraction form
    15,487.78/21,376.53 = 10,183.09/x
  3. Step 3: Cross multiply
    15,487.78x = 21,376.53 × 10,183.09
  4. Step 4: Simplify right side
    15,487.78x = 217,679,022.00
  5. Step 5: Solve for x
    x = 217,679,022.00/15,487.78
  6. Step 6: Final answer
    x = 14,054.89

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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.