Home / 19,781.09-29,663.94-7,127.47

Finding the Fourth Proportional to 19,781.09, 29,663.94 and 7,127.47

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Solution

The fourth proportional to 19,781.09, 29,663.94 and 7,127.47 is: 10,688.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.09 : 29,663.94 = 7,127.47 : x
  2. Step 2: Convert to fraction form
    19,781.09/29,663.94 = 7,127.47/x
  3. Step 3: Cross multiply
    19,781.09x = 29,663.94 × 7,127.47
  4. Step 4: Simplify right side
    19,781.09x = 211,428,658.47
  5. Step 5: Solve for x
    x = 211,428,658.47/19,781.09
  6. Step 6: Final answer
    x = 10,688.43

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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.