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Finding the Fourth Proportional to 27,018.40, 40,430.40 and 18,270.40

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Solution

The fourth proportional to 27,018.40, 40,430.40 and 18,270.40 is: 27,339.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,018.40 : 40,430.40 = 18,270.40 : x
  2. Step 2: Convert to fraction form
    27,018.40/40,430.40 = 18,270.40/x
  3. Step 3: Cross multiply
    27,018.40x = 40,430.40 × 18,270.40
  4. Step 4: Simplify right side
    27,018.40x = 738,679,580.16
  5. Step 5: Solve for x
    x = 738,679,580.16/27,018.40
  6. Step 6: Final answer
    x = 27,339.87

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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.