Home / 13,139.89-19,699.81-6,570.72

Finding the Fourth Proportional to 13,139.89, 19,699.81 and 6,570.72

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Solution

The fourth proportional to 13,139.89, 19,699.81 and 6,570.72 is: 9,851.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.89 : 19,699.81 = 6,570.72 : x
  2. Step 2: Convert to fraction form
    13,139.89/19,699.81 = 6,570.72/x
  3. Step 3: Cross multiply
    13,139.89x = 19,699.81 × 6,570.72
  4. Step 4: Simplify right side
    13,139.89x = 129,441,919.14
  5. Step 5: Solve for x
    x = 129,441,919.14/13,139.89
  6. Step 6: Final answer
    x = 9,851.07

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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.