Home / 28,479.50-39,289.08-18,408.80

Finding the Fourth Proportional to 28,479.50, 39,289.08 and 18,408.80

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Solution

The fourth proportional to 28,479.50, 39,289.08 and 18,408.80 is: 25,395.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.50 : 39,289.08 = 18,408.80 : x
  2. Step 2: Convert to fraction form
    28,479.50/39,289.08 = 18,408.80/x
  3. Step 3: Cross multiply
    28,479.50x = 39,289.08 × 18,408.80
  4. Step 4: Simplify right side
    28,479.50x = 723,264,983.16
  5. Step 5: Solve for x
    x = 723,264,983.16/28,479.50
  6. Step 6: Final answer
    x = 25,395.99

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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.