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Finding the Fourth Proportional to 15,580.09, 21,505.13 and 10,865.89

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Solution

The fourth proportional to 15,580.09, 21,505.13 and 10,865.89 is: 14,998.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,580.09 : 21,505.13 = 10,865.89 : x
  2. Step 2: Convert to fraction form
    15,580.09/21,505.13 = 10,865.89/x
  3. Step 3: Cross multiply
    15,580.09x = 21,505.13 × 10,865.89
  4. Step 4: Simplify right side
    15,580.09x = 233,672,377.02
  5. Step 5: Solve for x
    x = 233,672,377.02/15,580.09
  6. Step 6: Final answer
    x = 14,998.14

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.