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Finding the Fourth Proportional to 29,651.50, 40,928.79 and 21,292.30

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Solution

The fourth proportional to 29,651.50, 40,928.79 and 21,292.30 is: 29,390.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,651.50 : 40,928.79 = 21,292.30 : x
  2. Step 2: Convert to fraction form
    29,651.50/40,928.79 = 21,292.30/x
  3. Step 3: Cross multiply
    29,651.50x = 40,928.79 × 21,292.30
  4. Step 4: Simplify right side
    29,651.50x = 871,468,075.32
  5. Step 5: Solve for x
    x = 871,468,075.32/29,651.50
  6. Step 6: Final answer
    x = 29,390.35

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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.