Home / 19,929.12-27,512.74-15,442.80

Finding the Fourth Proportional to 19,929.12, 27,512.74 and 15,442.80

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Solution

The fourth proportional to 19,929.12, 27,512.74 and 15,442.80 is: 21,319.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.12 : 27,512.74 = 15,442.80 : x
  2. Step 2: Convert to fraction form
    19,929.12/27,512.74 = 15,442.80/x
  3. Step 3: Cross multiply
    19,929.12x = 27,512.74 × 15,442.80
  4. Step 4: Simplify right side
    19,929.12x = 424,873,741.27
  5. Step 5: Solve for x
    x = 424,873,741.27/19,929.12
  6. Step 6: Final answer
    x = 21,319.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.