Home / 21,290.76-29,380.08-11,730.31

Finding the Fourth Proportional to 21,290.76, 29,380.08 and 11,730.31

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Solution

The fourth proportional to 21,290.76, 29,380.08 and 11,730.31 is: 16,187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.76 : 29,380.08 = 11,730.31 : x
  2. Step 2: Convert to fraction form
    21,290.76/29,380.08 = 11,730.31/x
  3. Step 3: Cross multiply
    21,290.76x = 29,380.08 × 11,730.31
  4. Step 4: Simplify right side
    21,290.76x = 344,637,416.76
  5. Step 5: Solve for x
    x = 344,637,416.76/21,290.76
  6. Step 6: Final answer
    x = 16,187.18

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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.