Home / 21,582.81-29,788.47-12,151.44

Finding the Fourth Proportional to 21,582.81, 29,788.47 and 12,151.44

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Solution

The fourth proportional to 21,582.81, 29,788.47 and 12,151.44 is: 16,771.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,582.81 : 29,788.47 = 12,151.44 : x
  2. Step 2: Convert to fraction form
    21,582.81/29,788.47 = 12,151.44/x
  3. Step 3: Cross multiply
    21,582.81x = 29,788.47 × 12,151.44
  4. Step 4: Simplify right side
    21,582.81x = 361,972,805.90
  5. Step 5: Solve for x
    x = 361,972,805.90/21,582.81
  6. Step 6: Final answer
    x = 16,771.35

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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.