Home / 19,790.70-29,672.64-10,420.80

Finding the Fourth Proportional to 19,790.70, 29,672.64 and 10,420.80

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Solution

The fourth proportional to 19,790.70, 29,672.64 and 10,420.80 is: 15,624.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.70 : 29,672.64 = 10,420.80 : x
  2. Step 2: Convert to fraction form
    19,790.70/29,672.64 = 10,420.80/x
  3. Step 3: Cross multiply
    19,790.70x = 29,672.64 × 10,420.80
  4. Step 4: Simplify right side
    19,790.70x = 309,212,646.91
  5. Step 5: Solve for x
    x = 309,212,646.91/19,790.70
  6. Step 6: Final answer
    x = 15,624.14

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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.