Home / 13,775.11-19,009.58-7,807.91

Finding the Fourth Proportional to 13,775.11, 19,009.58 and 7,807.91

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Solution

The fourth proportional to 13,775.11, 19,009.58 and 7,807.91 is: 10,774.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.11 : 19,009.58 = 7,807.91 : x
  2. Step 2: Convert to fraction form
    13,775.11/19,009.58 = 7,807.91/x
  3. Step 3: Cross multiply
    13,775.11x = 19,009.58 × 7,807.91
  4. Step 4: Simplify right side
    13,775.11x = 148,424,955.69
  5. Step 5: Solve for x
    x = 148,424,955.69/13,775.11
  6. Step 6: Final answer
    x = 10,774.87

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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.