Home / 19,881.58-27,442.97-12,730.75

Finding the Fourth Proportional to 19,881.58, 27,442.97 and 12,730.75

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Solution

The fourth proportional to 19,881.58, 27,442.97 and 12,730.75 is: 17,572.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.58 : 27,442.97 = 12,730.75 : x
  2. Step 2: Convert to fraction form
    19,881.58/27,442.97 = 12,730.75/x
  3. Step 3: Cross multiply
    19,881.58x = 27,442.97 × 12,730.75
  4. Step 4: Simplify right side
    19,881.58x = 349,369,582.99
  5. Step 5: Solve for x
    x = 349,369,582.99/19,881.58
  6. Step 6: Final answer
    x = 17,572.52

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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.