Home / 20,070.40-27,720.48-18,904

Finding the Fourth Proportional to 20,070.40, 27,720.48 and 18,904

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Solution

The fourth proportional to 20,070.40, 27,720.48 and 18,904 is: 26,109.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,070.40 : 27,720.48 = 18,904 : x
  2. Step 2: Convert to fraction form
    20,070.40/27,720.48 = 18,904/x
  3. Step 3: Cross multiply
    20,070.40x = 27,720.48 × 18,904
  4. Step 4: Simplify right side
    20,070.40x = 524,027,953.92
  5. Step 5: Solve for x
    x = 524,027,953.92/20,070.40
  6. Step 6: Final answer
    x = 26,109.49

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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.