Home / 21,519.27-29,688.27-15,867.39

Finding the Fourth Proportional to 21,519.27, 29,688.27 and 15,867.39

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Solution

The fourth proportional to 21,519.27, 29,688.27 and 15,867.39 is: 21,890.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519.27 : 29,688.27 = 15,867.39 : x
  2. Step 2: Convert to fraction form
    21,519.27/29,688.27 = 15,867.39/x
  3. Step 3: Cross multiply
    21,519.27x = 29,688.27 × 15,867.39
  4. Step 4: Simplify right side
    21,519.27x = 471,075,358.52
  5. Step 5: Solve for x
    x = 471,075,358.52/21,519.27
  6. Step 6: Final answer
    x = 21,890.86

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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.