Home / 21,971.58-30,320.61-11,899.77

Finding the Fourth Proportional to 21,971.58, 30,320.61 and 11,899.77

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Solution

The fourth proportional to 21,971.58, 30,320.61 and 11,899.77 is: 16,421.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.58 : 30,320.61 = 11,899.77 : x
  2. Step 2: Convert to fraction form
    21,971.58/30,320.61 = 11,899.77/x
  3. Step 3: Cross multiply
    21,971.58x = 30,320.61 × 11,899.77
  4. Step 4: Simplify right side
    21,971.58x = 360,808,285.26
  5. Step 5: Solve for x
    x = 360,808,285.26/21,971.58
  6. Step 6: Final answer
    x = 16,421.59

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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.