Home / 28,172.37-38,876.40-15,423.12

Finding the Fourth Proportional to 28,172.37, 38,876.40 and 15,423.12

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Solution

The fourth proportional to 28,172.37, 38,876.40 and 15,423.12 is: 21,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.37 : 38,876.40 = 15,423.12 : x
  2. Step 2: Convert to fraction form
    28,172.37/38,876.40 = 15,423.12/x
  3. Step 3: Cross multiply
    28,172.37x = 38,876.40 × 15,423.12
  4. Step 4: Simplify right side
    28,172.37x = 599,595,382.37
  5. Step 5: Solve for x
    x = 599,595,382.37/28,172.37
  6. Step 6: Final answer
    x = 21,283.10

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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.