Home / 19,420.70-29,109.45-10,661.90

Finding the Fourth Proportional to 19,420.70, 29,109.45 and 10,661.90

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Solution

The fourth proportional to 19,420.70, 29,109.45 and 10,661.90 is: 15,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,420.70 : 29,109.45 = 10,661.90 : x
  2. Step 2: Convert to fraction form
    19,420.70/29,109.45 = 10,661.90/x
  3. Step 3: Cross multiply
    19,420.70x = 29,109.45 × 10,661.90
  4. Step 4: Simplify right side
    19,420.70x = 310,362,044.96
  5. Step 5: Solve for x
    x = 310,362,044.96/19,420.70
  6. Step 6: Final answer
    x = 15,980.99

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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.