Home / 12,885.12-19,344-10,720.32

Finding the Fourth Proportional to 12,885.12, 19,344 and 10,720.32

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Solution

The fourth proportional to 12,885.12, 19,344 and 10,720.32 is: 16,094.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.12 : 19,344 = 10,720.32 : x
  2. Step 2: Convert to fraction form
    12,885.12/19,344 = 10,720.32/x
  3. Step 3: Cross multiply
    12,885.12x = 19,344 × 10,720.32
  4. Step 4: Simplify right side
    12,885.12x = 207,373,870.08
  5. Step 5: Solve for x
    x = 207,373,870.08/12,885.12
  6. Step 6: Final answer
    x = 16,094.06

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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.