Home / 19,980.86-29,920.05-19,389.60

Finding the Fourth Proportional to 19,980.86, 29,920.05 and 19,389.60

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Solution

The fourth proportional to 19,980.86, 29,920.05 and 19,389.60 is: 29,034.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.86 : 29,920.05 = 19,389.60 : x
  2. Step 2: Convert to fraction form
    19,980.86/29,920.05 = 19,389.60/x
  3. Step 3: Cross multiply
    19,980.86x = 29,920.05 × 19,389.60
  4. Step 4: Simplify right side
    19,980.86x = 580,137,801.48
  5. Step 5: Solve for x
    x = 580,137,801.48/19,980.86
  6. Step 6: Final answer
    x = 29,034.68

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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.