Home / 12,455.07-18,663.13-7,828.35

Finding the Fourth Proportional to 12,455.07, 18,663.13 and 7,828.35

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Solution

The fourth proportional to 12,455.07, 18,663.13 and 7,828.35 is: 11,730.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.07 : 18,663.13 = 7,828.35 : x
  2. Step 2: Convert to fraction form
    12,455.07/18,663.13 = 7,828.35/x
  3. Step 3: Cross multiply
    12,455.07x = 18,663.13 × 7,828.35
  4. Step 4: Simplify right side
    12,455.07x = 146,101,513.74
  5. Step 5: Solve for x
    x = 146,101,513.74/12,455.07
  6. Step 6: Final answer
    x = 11,730.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.