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Finding the Fourth Proportional to 34,894.19, 48,153.49 and 18,978.30

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Solution

The fourth proportional to 34,894.19, 48,153.49 and 18,978.30 is: 26,189.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,894.19 : 48,153.49 = 18,978.30 : x
  2. Step 2: Convert to fraction form
    34,894.19/48,153.49 = 18,978.30/x
  3. Step 3: Cross multiply
    34,894.19x = 48,153.49 × 18,978.30
  4. Step 4: Simplify right side
    34,894.19x = 913,871,331.82
  5. Step 5: Solve for x
    x = 913,871,331.82/34,894.19
  6. Step 6: Final answer
    x = 26,189.78

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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.