Home / 19,771.60-29,621.40-15,638.80

Finding the Fourth Proportional to 19,771.60, 29,621.40 and 15,638.80

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Solution

The fourth proportional to 19,771.60, 29,621.40 and 15,638.80 is: 23,429.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,771.60 : 29,621.40 = 15,638.80 : x
  2. Step 2: Convert to fraction form
    19,771.60/29,621.40 = 15,638.80/x
  3. Step 3: Cross multiply
    19,771.60x = 29,621.40 × 15,638.80
  4. Step 4: Simplify right side
    19,771.60x = 463,243,150.32
  5. Step 5: Solve for x
    x = 463,243,150.32/19,771.60
  6. Step 6: Final answer
    x = 23,429.72

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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.