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Finding the Fourth Proportional to 18,155.52, 25,061.06 and 10,985.81

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Solution

The fourth proportional to 18,155.52, 25,061.06 and 10,985.81 is: 15,164.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,155.52 : 25,061.06 = 10,985.81 : x
  2. Step 2: Convert to fraction form
    18,155.52/25,061.06 = 10,985.81/x
  3. Step 3: Cross multiply
    18,155.52x = 25,061.06 × 10,985.81
  4. Step 4: Simplify right side
    18,155.52x = 275,316,043.56
  5. Step 5: Solve for x
    x = 275,316,043.56/18,155.52
  6. Step 6: Final answer
    x = 15,164.32

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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.