Home / 13,888.96-19,167.36-7,920.16

Finding the Fourth Proportional to 13,888.96, 19,167.36 and 7,920.16

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Solution

The fourth proportional to 13,888.96, 19,167.36 and 7,920.16 is: 10,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.96 : 19,167.36 = 7,920.16 : x
  2. Step 2: Convert to fraction form
    13,888.96/19,167.36 = 7,920.16/x
  3. Step 3: Cross multiply
    13,888.96x = 19,167.36 × 7,920.16
  4. Step 4: Simplify right side
    13,888.96x = 151,808,557.98
  5. Step 5: Solve for x
    x = 151,808,557.98/13,888.96
  6. Step 6: Final answer
    x = 10,930.16

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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.