Home / 28,007.50-38,650.47-15,431.98

Finding the Fourth Proportional to 28,007.50, 38,650.47 and 15,431.98

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Solution

The fourth proportional to 28,007.50, 38,650.47 and 15,431.98 is: 21,296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.50 : 38,650.47 = 15,431.98 : x
  2. Step 2: Convert to fraction form
    28,007.50/38,650.47 = 15,431.98/x
  3. Step 3: Cross multiply
    28,007.50x = 38,650.47 × 15,431.98
  4. Step 4: Simplify right side
    28,007.50x = 596,453,280.03
  5. Step 5: Solve for x
    x = 596,453,280.03/28,007.50
  6. Step 6: Final answer
    x = 21,296.20

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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.