Home / 19,980.20-29,955.90-13,058.60

Finding the Fourth Proportional to 19,980.20, 29,955.90 and 13,058.60

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Solution

The fourth proportional to 19,980.20, 29,955.90 and 13,058.60 is: 19,578.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.20 : 29,955.90 = 13,058.60 : x
  2. Step 2: Convert to fraction form
    19,980.20/29,955.90 = 13,058.60/x
  3. Step 3: Cross multiply
    19,980.20x = 29,955.90 × 13,058.60
  4. Step 4: Simplify right side
    19,980.20x = 391,182,115.74
  5. Step 5: Solve for x
    x = 391,182,115.74/19,980.20
  6. Step 6: Final answer
    x = 19,578.49

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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.