Home / 21,281.92-29,368.77-11,721.62

Finding the Fourth Proportional to 21,281.92, 29,368.77 and 11,721.62

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Solution

The fourth proportional to 21,281.92, 29,368.77 and 11,721.62 is: 16,175.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.92 : 29,368.77 = 11,721.62 : x
  2. Step 2: Convert to fraction form
    21,281.92/29,368.77 = 11,721.62/x
  3. Step 3: Cross multiply
    21,281.92x = 29,368.77 × 11,721.62
  4. Step 4: Simplify right side
    21,281.92x = 344,249,503.20
  5. Step 5: Solve for x
    x = 344,249,503.20/21,281.92
  6. Step 6: Final answer
    x = 16,175.68

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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.