Home / 13,890.79-19,167.94-7,920.89

Finding the Fourth Proportional to 13,890.79, 19,167.94 and 7,920.89

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Solution

The fourth proportional to 13,890.79, 19,167.94 and 7,920.89 is: 10,930.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.79 : 19,167.94 = 7,920.89 : x
  2. Step 2: Convert to fraction form
    13,890.79/19,167.94 = 7,920.89/x
  3. Step 3: Cross multiply
    13,890.79x = 19,167.94 × 7,920.89
  4. Step 4: Simplify right side
    13,890.79x = 151,827,130.21
  5. Step 5: Solve for x
    x = 151,827,130.21/13,890.79
  6. Step 6: Final answer
    x = 10,930.06

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1.5x scale

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.