Home / 28,431.36-42,662.88-11,803.68

Finding the Fourth Proportional to 28,431.36, 42,662.88 and 11,803.68

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Solution

The fourth proportional to 28,431.36, 42,662.88 and 11,803.68 is: 17,712.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.36 : 42,662.88 = 11,803.68 : x
  2. Step 2: Convert to fraction form
    28,431.36/42,662.88 = 11,803.68/x
  3. Step 3: Cross multiply
    28,431.36x = 42,662.88 × 11,803.68
  4. Step 4: Simplify right side
    28,431.36x = 503,578,983.40
  5. Step 5: Solve for x
    x = 503,578,983.40/28,431.36
  6. Step 6: Final answer
    x = 17,712.10

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1.5x scale

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.