Home / 21,421.77-29,530.59-15,028.98

Finding the Fourth Proportional to 21,421.77, 29,530.59 and 15,028.98

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Solution

The fourth proportional to 21,421.77, 29,530.59 and 15,028.98 is: 20,717.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.77 : 29,530.59 = 15,028.98 : x
  2. Step 2: Convert to fraction form
    21,421.77/29,530.59 = 15,028.98/x
  3. Step 3: Cross multiply
    21,421.77x = 29,530.59 × 15,028.98
  4. Step 4: Simplify right side
    21,421.77x = 443,814,646.50
  5. Step 5: Solve for x
    x = 443,814,646.50/21,421.77
  6. Step 6: Final answer
    x = 20,717.93

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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.