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Finding the Fourth Proportional to 19,359.40, 29,060.70 and 18,090.40

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Solution

The fourth proportional to 19,359.40, 29,060.70 and 18,090.40 is: 27,155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,359.40 : 29,060.70 = 18,090.40 : x
  2. Step 2: Convert to fraction form
    19,359.40/29,060.70 = 18,090.40/x
  3. Step 3: Cross multiply
    19,359.40x = 29,060.70 × 18,090.40
  4. Step 4: Simplify right side
    19,359.40x = 525,719,687.28
  5. Step 5: Solve for x
    x = 525,719,687.28/19,359.40
  6. Step 6: Final answer
    x = 27,155.78

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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.