Home / 28,089.27-38,762.66-15,513.75

Finding the Fourth Proportional to 28,089.27, 38,762.66 and 15,513.75

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Solution

The fourth proportional to 28,089.27, 38,762.66 and 15,513.75 is: 21,408.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.27 : 38,762.66 = 15,513.75 : x
  2. Step 2: Convert to fraction form
    28,089.27/38,762.66 = 15,513.75/x
  3. Step 3: Cross multiply
    28,089.27x = 38,762.66 × 15,513.75
  4. Step 4: Simplify right side
    28,089.27x = 601,354,139.01
  5. Step 5: Solve for x
    x = 601,354,139.01/28,089.27
  6. Step 6: Final answer
    x = 21,408.68

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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.