Home / 19,989.78-27,622.53-17,328.66

Finding the Fourth Proportional to 19,989.78, 27,622.53 and 17,328.66

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Solution

The fourth proportional to 19,989.78, 27,622.53 and 17,328.66 is: 23,945.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.78 : 27,622.53 = 17,328.66 : x
  2. Step 2: Convert to fraction form
    19,989.78/27,622.53 = 17,328.66/x
  3. Step 3: Cross multiply
    19,989.78x = 27,622.53 × 17,328.66
  4. Step 4: Simplify right side
    19,989.78x = 478,661,430.71
  5. Step 5: Solve for x
    x = 478,661,430.71/19,989.78
  6. Step 6: Final answer
    x = 23,945.31

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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.