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Finding the Fourth Proportional to 18,916.87, 26,109.80 and 10,963.48

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Solution

The fourth proportional to 18,916.87, 26,109.80 and 10,963.48 is: 15,132.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.87 : 26,109.80 = 10,963.48 : x
  2. Step 2: Convert to fraction form
    18,916.87/26,109.80 = 10,963.48/x
  3. Step 3: Cross multiply
    18,916.87x = 26,109.80 × 10,963.48
  4. Step 4: Simplify right side
    18,916.87x = 286,254,270.10
  5. Step 5: Solve for x
    x = 286,254,270.10/18,916.87
  6. Step 6: Final answer
    x = 15,132.22

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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.