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Finding the Fourth Proportional to 18,145, 25,038.18 and 10,188.12

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Solution

The fourth proportional to 18,145, 25,038.18 and 10,188.12 is: 14,058.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145 : 25,038.18 = 10,188.12 : x
  2. Step 2: Convert to fraction form
    18,145/25,038.18 = 10,188.12/x
  3. Step 3: Cross multiply
    18,145x = 25,038.18 × 10,188.12
  4. Step 4: Simplify right side
    18,145x = 255,091,982.42
  5. Step 5: Solve for x
    x = 255,091,982.42/18,145
  6. Step 6: Final answer
    x = 14,058.53

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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.