Home / 28,255.50-42,389.71-12,465.02

Finding the Fourth Proportional to 28,255.50, 42,389.71 and 12,465.02

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Solution

The fourth proportional to 28,255.50, 42,389.71 and 12,465.02 is: 18,700.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.50 : 42,389.71 = 12,465.02 : x
  2. Step 2: Convert to fraction form
    28,255.50/42,389.71 = 12,465.02/x
  3. Step 3: Cross multiply
    28,255.50x = 42,389.71 × 12,465.02
  4. Step 4: Simplify right side
    28,255.50x = 528,388,657.76
  5. Step 5: Solve for x
    x = 528,388,657.76/28,255.50
  6. Step 6: Final answer
    x = 18,700.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.