Home / 21,218.70-29,282.31-11,658.50

Finding the Fourth Proportional to 21,218.70, 29,282.31 and 11,658.50

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Solution

The fourth proportional to 21,218.70, 29,282.31 and 11,658.50 is: 16,089.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.70 : 29,282.31 = 11,658.50 : x
  2. Step 2: Convert to fraction form
    21,218.70/29,282.31 = 11,658.50/x
  3. Step 3: Cross multiply
    21,218.70x = 29,282.31 × 11,658.50
  4. Step 4: Simplify right side
    21,218.70x = 341,387,730.81
  5. Step 5: Solve for x
    x = 341,387,730.81/21,218.70
  6. Step 6: Final answer
    x = 16,089.00

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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.