Home / 28,780.36-39,457.85-28,255.48

Finding the Fourth Proportional to 28,780.36, 39,457.85 and 28,255.48

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Solution

The fourth proportional to 28,780.36, 39,457.85 and 28,255.48 is: 38,738.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.36 : 39,457.85 = 28,255.48 : x
  2. Step 2: Convert to fraction form
    28,780.36/39,457.85 = 28,255.48/x
  3. Step 3: Cross multiply
    28,780.36x = 39,457.85 × 28,255.48
  4. Step 4: Simplify right side
    28,780.36x = 1,114,900,491.52
  5. Step 5: Solve for x
    x = 1,114,900,491.52/28,780.36
  6. Step 6: Final answer
    x = 38,738.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.