Home / 13,890.34-19,167.51-7,921.90

Finding the Fourth Proportional to 13,890.34, 19,167.51 and 7,921.90

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Solution

The fourth proportional to 13,890.34, 19,167.51 and 7,921.90 is: 10,931.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.34 : 19,167.51 = 7,921.90 : x
  2. Step 2: Convert to fraction form
    13,890.34/19,167.51 = 7,921.90/x
  3. Step 3: Cross multiply
    13,890.34x = 19,167.51 × 7,921.90
  4. Step 4: Simplify right side
    13,890.34x = 151,843,097.47
  5. Step 5: Solve for x
    x = 151,843,097.47/13,890.34
  6. Step 6: Final answer
    x = 10,931.56

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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.