Home / 19,621.40-29,432.10-7,928.60

Finding the Fourth Proportional to 19,621.40, 29,432.10 and 7,928.60

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Solution

The fourth proportional to 19,621.40, 29,432.10 and 7,928.60 is: 11,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,621.40 : 29,432.10 = 7,928.60 : x
  2. Step 2: Convert to fraction form
    19,621.40/29,432.10 = 7,928.60/x
  3. Step 3: Cross multiply
    19,621.40x = 29,432.10 × 7,928.60
  4. Step 4: Simplify right side
    19,621.40x = 233,355,348.06
  5. Step 5: Solve for x
    x = 233,355,348.06/19,621.40
  6. Step 6: Final answer
    x = 11,892.90

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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.