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Finding the Fourth Proportional to 15,916.10, 21,954.78 and 10,877.76

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Solution

The fourth proportional to 15,916.10, 21,954.78 and 10,877.76 is: 15,004.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,916.10 : 21,954.78 = 10,877.76 : x
  2. Step 2: Convert to fraction form
    15,916.10/21,954.78 = 10,877.76/x
  3. Step 3: Cross multiply
    15,916.10x = 21,954.78 × 10,877.76
  4. Step 4: Simplify right side
    15,916.10x = 238,818,827.69
  5. Step 5: Solve for x
    x = 238,818,827.69/15,916.10
  6. Step 6: Final answer
    x = 15,004.86

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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.