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Finding the Fourth Proportional to 15,141.18, 20,892.23 and 13,916.31

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Solution

The fourth proportional to 15,141.18, 20,892.23 and 13,916.31 is: 19,202.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,141.18 : 20,892.23 = 13,916.31 : x
  2. Step 2: Convert to fraction form
    15,141.18/20,892.23 = 13,916.31/x
  3. Step 3: Cross multiply
    15,141.18x = 20,892.23 × 13,916.31
  4. Step 4: Simplify right side
    15,141.18x = 290,742,653.53
  5. Step 5: Solve for x
    x = 290,742,653.53/15,141.18
  6. Step 6: Final answer
    x = 19,202.12

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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.