Home / 28,519.76-42,731.48-12,700.60

Finding the Fourth Proportional to 28,519.76, 42,731.48 and 12,700.60

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Solution

The fourth proportional to 28,519.76, 42,731.48 and 12,700.60 is: 19,029.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.76 : 42,731.48 = 12,700.60 : x
  2. Step 2: Convert to fraction form
    28,519.76/42,731.48 = 12,700.60/x
  3. Step 3: Cross multiply
    28,519.76x = 42,731.48 × 12,700.60
  4. Step 4: Simplify right side
    28,519.76x = 542,715,359.81
  5. Step 5: Solve for x
    x = 542,715,359.81/28,519.76
  6. Step 6: Final answer
    x = 19,029.45

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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.