Home / 28,089.24-38,761.20-15,513

Finding the Fourth Proportional to 28,089.24, 38,761.20 and 15,513

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Solution

The fourth proportional to 28,089.24, 38,761.20 and 15,513 is: 21,406.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.24 : 38,761.20 = 15,513 : x
  2. Step 2: Convert to fraction form
    28,089.24/38,761.20 = 15,513/x
  3. Step 3: Cross multiply
    28,089.24x = 38,761.20 × 15,513
  4. Step 4: Simplify right side
    28,089.24x = 601,302,495.60
  5. Step 5: Solve for x
    x = 601,302,495.60/28,089.24
  6. Step 6: Final answer
    x = 21,406.86

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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.