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Finding the Fourth Proportional to 18,123.93, 27,192.81 and 7,038.40

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Solution

The fourth proportional to 18,123.93, 27,192.81 and 7,038.40 is: 10,560.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,123.93 : 27,192.81 = 7,038.40 : x
  2. Step 2: Convert to fraction form
    18,123.93/27,192.81 = 7,038.40/x
  3. Step 3: Cross multiply
    18,123.93x = 27,192.81 × 7,038.40
  4. Step 4: Simplify right side
    18,123.93x = 191,393,873.90
  5. Step 5: Solve for x
    x = 191,393,873.90/18,123.93
  6. Step 6: Final answer
    x = 10,560.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.