Home / 13,888.31-19,165.40-7,921.91

Finding the Fourth Proportional to 13,888.31, 19,165.40 and 7,921.91

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Solution

The fourth proportional to 13,888.31, 19,165.40 and 7,921.91 is: 10,931.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.31 : 19,165.40 = 7,921.91 : x
  2. Step 2: Convert to fraction form
    13,888.31/19,165.40 = 7,921.91/x
  3. Step 3: Cross multiply
    13,888.31x = 19,165.40 × 7,921.91
  4. Step 4: Simplify right side
    13,888.31x = 151,826,534.30
  5. Step 5: Solve for x
    x = 151,826,534.30/13,888.31
  6. Step 6: Final answer
    x = 10,931.97

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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.