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Finding the Fourth Proportional to 18,477.90, 27,720.90 and 10,572.30

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Solution

The fourth proportional to 18,477.90, 27,720.90 and 10,572.30 is: 15,860.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,477.90 : 27,720.90 = 10,572.30 : x
  2. Step 2: Convert to fraction form
    18,477.90/27,720.90 = 10,572.30/x
  3. Step 3: Cross multiply
    18,477.90x = 27,720.90 × 10,572.30
  4. Step 4: Simplify right side
    18,477.90x = 293,073,671.07
  5. Step 5: Solve for x
    x = 293,073,671.07/18,477.90
  6. Step 6: Final answer
    x = 15,860.77

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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.