Home / 21,421.33-29,561.47-11,730.74

Finding the Fourth Proportional to 21,421.33, 29,561.47 and 11,730.74

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Solution

The fourth proportional to 21,421.33, 29,561.47 and 11,730.74 is: 16,188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.33 : 29,561.47 = 11,730.74 : x
  2. Step 2: Convert to fraction form
    21,421.33/29,561.47 = 11,730.74/x
  3. Step 3: Cross multiply
    21,421.33x = 29,561.47 × 11,730.74
  4. Step 4: Simplify right side
    21,421.33x = 346,777,963.16
  5. Step 5: Solve for x
    x = 346,777,963.16/21,421.33
  6. Step 6: Final answer
    x = 16,188.44

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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.