Home / 13,781.30-19,013.58-7,730.66

Finding the Fourth Proportional to 13,781.30, 19,013.58 and 7,730.66

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Solution

The fourth proportional to 13,781.30, 19,013.58 and 7,730.66 is: 10,665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.30 : 19,013.58 = 7,730.66 : x
  2. Step 2: Convert to fraction form
    13,781.30/19,013.58 = 7,730.66/x
  3. Step 3: Cross multiply
    13,781.30x = 19,013.58 × 7,730.66
  4. Step 4: Simplify right side
    13,781.30x = 146,987,427.29
  5. Step 5: Solve for x
    x = 146,987,427.29/13,781.30
  6. Step 6: Final answer
    x = 10,665.72

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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.