Home / 21,320.71-29,421.86-11,760.98

Finding the Fourth Proportional to 21,320.71, 29,421.86 and 11,760.98

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Solution

The fourth proportional to 21,320.71, 29,421.86 and 11,760.98 is: 16,229.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.71 : 29,421.86 = 11,760.98 : x
  2. Step 2: Convert to fraction form
    21,320.71/29,421.86 = 11,760.98/x
  3. Step 3: Cross multiply
    21,320.71x = 29,421.86 × 11,760.98
  4. Step 4: Simplify right side
    21,320.71x = 346,029,701.11
  5. Step 5: Solve for x
    x = 346,029,701.11/21,320.71
  6. Step 6: Final answer
    x = 16,229.75

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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.