Home / 21,582.21-29,776.50-13,087.74

Finding the Fourth Proportional to 21,582.21, 29,776.50 and 13,087.74

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Solution

The fourth proportional to 21,582.21, 29,776.50 and 13,087.74 is: 18,056.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,582.21 : 29,776.50 = 13,087.74 : x
  2. Step 2: Convert to fraction form
    21,582.21/29,776.50 = 13,087.74/x
  3. Step 3: Cross multiply
    21,582.21x = 29,776.50 × 13,087.74
  4. Step 4: Simplify right side
    21,582.21x = 389,707,090.11
  5. Step 5: Solve for x
    x = 389,707,090.11/21,582.21
  6. Step 6: Final answer
    x = 18,056.87

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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.